More than 1,000 New Yorkers braved the frigid temperatures on Thursday night, stretching across Lexington Avenue on the Upper East Side outside of the historic Park East Synagogue, surrounded by heavy police presence and voicing a unifying message: “We are proud New Yorkers, proud Jews and proud Zionists.” 

“The stakes in this moment could not be higher, because how we act will define our community for years to come,” Eric Goldstein, outgoing CEO of UJA-Federation of New York, told the crowd. “We gather outside the sacred space that was targeted weeks ago, standing together to defend our rights as Jews to worship safely and to support Israel’s right to exist as our Jewish homeland.” 

The scene was a sharp contrast from the one two weeks ago on that same street when a mob of anti-Israel demonstrators protested outside of the Modern Orthodox synagogue, which was hosting a Nefesh B’Nefesh event providing information on immigration to Israel, shouting chants including “death to the IDF” and “globalize the Intifada.” NYPD Commissioner Jessica Tisch later called the protest “turmoil.”

The solidarity gathering, organized by UJA-Federation as a response to the Nov. 19 protest, drew a diverse coalition of participating Jewish groups, including more than 70 synagogues, schools and Jewish institutions, representing a wide range of denominations and political leanings. Other major Jewish groups acted as cosponsors, including the Jewish Community Relations Council of New York, the Anti-Defamation League and American Jewish Committee, the Conference of Presidents of Major American Jewish Organizations and the New York Board of Rabbis. 

Members of B’nai Jeshurun, a non-denominational and progressive Upper West Side synagogue stood side by side with congregants of The Altneu, an Orthodox congregation on the Upper East Side, to condemn antisemitism; Columbia University Hillel student leaders, who have witnessed some of New York City’s worst antisemitic protests on campus, came out in solidarity, as did Yeshiva University students and high schoolers from the Modern Orthodox SAR Academy in Riverdale and Manhattan’s Modern Orthodox Ramaz School and pluralistic Heschel School. Brooklynites representing the Park Slope Jewish Center and Prospect Heights Shul crossed the river to participate, as did members of Long Island and Westchester Jewish communities.

The rally marked the first major gathering of diverse Jewish groups since the release of the remaining living hostages kidnapped during the Oct, 7, 2023, attacks and a ceasefire in the Israel-Hamas war in October. Throughout the war, such gatherings had become common across the U.S., with a unifying focus on bringing home the hostages. 

Speakers at the hourlong event, in addition to Goldstein, were Rabbi Arthur Schneier, who leads Park East Synagogue; Hindy Poupko, UJA-Federation senior vice president of community organizing and external relations; Rabbi Joe Potasnik, executive vice president of the New York Board of Rabbis; Rabba Sara Hurwitz, spiritual leader of the Hebrew Institute of Riverdale; Rabbi Joanna Samuels, CEO of the Marlene Meyerson JCC Manhattan; Rabbi David Ingber, founding rabbi of the non-denominational Romemu synagogue and senior director for Jewish Life at the 92nd Street Y; NYC Comptroller-elect Mark Levine; and Mark Treyger, CEO of JCRC-NY. The gathering also featured live performances by rapper Matisyahu and the Park East Day School choir. 

“We’re not going back — we’re only going forward,” said Treyger. “We’re going to work and fight to make sure that we see a day where every Jewish New Yorker, every member of our community, is safe, not just in our houses of worship but in every corner of our great city.” 

Schneier, who has served as senior rabbi of Park East Synagogue for more than 50 years, told Jewish Insider that the recent protest was “meant to incite fear and intimidation.”

“Chants of antisemitism, demonizing the State of Israel and its right to exist, and calling for a global intifada. Silence and indifference are not an option. No faith community should ever be met with threats, or fear risking their life to gather and pray. This gathering sends a powerful message,” he said

Schneier called for “safety and security and immediate legislation from the city and state to ban demonstrations in front of synagogues and all houses of worship,” which has been introduced by New York state legislators in recent days.  

“Let our voices be heard in solidarity — and together, we stand united against a surge of antisemitism that threatens peaceful coexistence in our city. What starts with the Jews doesn’t end with the Jews,” Schneier said, remembering his experience as an 8-year-old child in Vienna in 1938.   

“I witnessed my cherished synagogue smoldering to the ground during Kristallnacht — an organized, calculated assault on the Jewish community that was meant to terrorize and intimidate. It was just the precursor of what I lived through during the Holocaust.”

New Yorkers elected democratic socialist Zohran Mamdani on Tuesday as the next New York City mayor, ensuring the city will be headed in a leftward ideological direction for the next four years. Mamdani’s election has also sparked widespread concerns in the city’s Jewish community about how the incoming mayor, who refused to condemn “globalize the intifada” rhetoric or acknowledge the state of Israel as a Jewish homeland, would impact the day-to-day life of Jewish New Yorkers.

Jewish Insider asked senior New York Democratic officials and Jewish community leaders — granted anonymity to offer their candid thoughts — to discuss the top threats that a Mamdani administration could pose to Jewish life in the city.

Respondents expressed worry that Mamdani’s anti-Israel worldview could lead to heightened antisemitism, bring a vanguard of leftist operatives hostile to Jewish concerns into City Hall,  impact the effectiveness of the New York Police Department and fray ties between the city and Israeli institutions or businesses. He has even vowed to arrest Israeli Prime Minister Benjamin Netanyahu if he visits, though experts have voiced doubt on the legality of the move.

These are five of the leading concerns from the Jewish communal leadership in New York City, home to the largest Jewish community in the country, about what Mamdani might do as mayor: 

1. Mamdani has expressed a desire to defund, or even disband, the NYPD’s Strategic Response Group — the unit that responds to major protests, such as the anti-Israel encampment on Columbia University’s campus last year:

“He’s been pushing for years to disband the NYPD’s Strategic Response Group,” a source with knowledge of city government told JI. In December 2024, Mamdani tweeted, “As mayor, I will disband the SRG, which has cost taxpayers millions in lawsuit settlements and brutalized countless New Yorkers exercising their first amendment rights.” 

The SRG responds to hostage situations, riots and protests, including the deadly Park Avenue office building shooting that occurred in July. In April 2024, the Strategic Response Group was called in to assist with clearing the anti-Israel encampment that overtook Columbia University, which saw several incidents of physical assault against Jewish students.  

“One question is if he’s actually successful in disbanding them,” the source continued. “That will depend on his will and bureaucracy and whether he can put together an administration to accomplish his tasks. If he’s going to be an effective mayor, then yes he could do it. And if he is, then you’re going to see completely different responses in the city. 

“Something super important is whether a Mamdani administration would actually have a proactive approach to policing and using security in a way that will make sure Jewish New Yorkers are safe. If it’s not a priority for them, then I’m afraid to see what will happen.”

2. Mamdani could further politicize NYC Public Schools at a time when anti-Israel rhetoric and related antisemitic incidents have surged dramatically in K-12 schools:

In the aftermath of the Oct. 7, 2023, Hamas terror attacks, New York City Public Schools launched new curriculum materials on antisemitism and Islamophobia in its schools. As mayor, Mamdani will have power to appoint a new chancellor of public schools, who could rewrite that curriculum. 

Former Rep. Jamaal Bowman, previously a far-left congressman who lost reelection in part because of his radical views towards Israel, has been discussed as a potential candidate to lead the country’s largest public school system. Bowman embraced a number of hostile positions toward Israel in the aftermath of Oct. 7 and throughout his reelection campaign, including pledging to oppose funding for Israel’s Iron Dome missile defense system and endorsing the BDS movement. 

The New York City Public School system has seen a surge of anti-Israel activity since Oct. 7. In November 2023, a Queens high school teacher said she was forced to hide in a locked office as a mob of students tried to push their way into her classroom, after learning she attended a pro-Israel rally. 

In May, a “Teacher Career Pathways” newsletter for educators in the city’s 1,800 schools called for students to be heard on the “genocide in Gaza.” NYC Schools Chancellor Melissa Aviles-Ramos apologized for the mass communication, stating that it should not have been released without consultation from the mayor’s office. 

A political insider told JI there is anxiety the new administration will fuel anti-Israel discourse in the classroom. “There’s concern about what curriculums will be used to teach about the [Israeli-Palestinian] conflict,” he said. “What vendors will be used?”

The American Jewish Committee announced plans on Wednesday to “boost the ‘Hidden Voices’ curriculum in New York City public schools, which provides resources, lesson plans and workshops to highlight the histories and contributions of underrepresented groups in U.S. history.” 

3. Mamdani has expressed support for the BDS movement, which could have a wide-ranging impact on Israeli partnerships with New York City companies or institutions.

Mamdani said in June that he would attempt to divest from Israel if elected mayor — including discontinuing the NYC-Israel Economic Council, which Mayor Eric Adams recently launched.  

“His pursuit of discriminatory policies that boycott and divest from Israel, companies doing business in Israel, and U.S.-Israel tech partnerships could cost New York taxpayers billions over the next ten years,” said the head of a leading Jewish organization. “He knows [BDS] policy is discriminatory and antisemitic, yet he refuses to abandon it. Even worse, he continues to double down and has made it an important piece of his economic strategy.”   

Mamdani has also said he would “reassess” the partnership between Cornell University and Israel’s Technion, potentially displacing it from its campus on Roosevelt Island. “Ending [the Cornell-Technion] partnership would deal a blow to the city’s booming tech sector, chase away innovators, destroy vital educational opportunities, and damage New York’s reputation as a global business hub,” Ted Deutch, CEO of the AJC, said in a statement. 

A political insider and Jewish communal leader told JI those are policies Mamdani could enforce, but “he would have to go out of his way to.”

“He said he’ll divest from Israel but it would be unprecedented for him to start organizing the pension boards under the comptroller,” the source said. “It doesn’t mean he won’t do it, but it’s more complicated than the stroke of a pen. No one knows if he will be passive, aggressive or proactive; there are many options of what we could do.” 

4. Mamdani’s inability to condemn antisemitism from his public perch, while associating himself with extremist individuals could lead to a rise in antisemitism:

During the campaign, Mamdani affiliated with anti-Israel activist Linda Sarsour, considered to be one of the mayor-elect’s mentors and Imam Siraj Wahhaj, who Mamdani called one of the “foremost Muslim leaders” in the U.S. Wahhaj has a history of supporting controversial figures involved in terrorism, including testifying as a character witness at the trial of Omar Abdel-Rahman who was found guilty of seditious conspiracy for his role in plotting the 1993 World Trade Center bombing. Jeremy Corbyn, who led Britain’s Labour Party and was suspended over antisemitic comments, also phone-banked for Mamdani in the closing days of the campaign.

Mamdani has said he would oppose using the International Holocaust Remembrance Alliance’s working definition of antisemitism, which would dismantle an executive order signed by Adams in June as part of a push against rising antisemitism. 

“Even if Mamdani doesn’t do anything to actually impact the day-to-day of the Jewish community, the symbolic impact of Mamdani’s victory [is] devastating,” another veteran Jewish communal leader said. “It shows that a person espousing views that most of us consider dangerous and antisemitic can get elected. It’s the breaking of a taboo.”

5. Mamdani’s failure to equate anti-Zionism with antisemitism could weaken enforcement of laws protecting Jewish institutions: 

Throughout his campaign, Mamdani repeatedly said he does not support Israel’s right to exist as a Jewish state and that his criticism of Israel does not amount to antisemitism. But the majority of Jewish Americans report that Israel is a large part of their Jewish identity. 

Antisemitism watchers have noted that anti-Israel demonstrations — especially those on college campuses — have increasingly turned blatantly antisemitic by targeting Jewish, not Israeli, institutions such as Hillels and Chabad houses. 

The communal leader and political insider added that it’s uncertain where Mamdani draws a line at anti-Israel activity crossing into antisemitism, and therefore whether he would protect Jewish institutions. For example, they said, “it’s unclear if he would use protesting a university Hillel with ‘Free Palestine’ as antisemitic or anti-Zionist.”