Zohran Mamdani, the Democratic nominee for mayor of New York City, attended his first Rosh Hashanah service on Monday night at a Brooklyn synagogue well-known for its anti-Zionist activism.

The visit to Kolot Chayeinu, a nondenominational synagogue in Park Slope that has drawn controversy over its anti-Zionist orientation, comes as Mamdani is seeking to engage in increased outreach to Jewish voters ahead of the November election.

But the venue choice also underscores his polarizing position in the broader Jewish community — where many Jewish leaders have continued to raise alarms over his anti-Israel policies and refusal to condemn calls to “globalize the intifada,” among other issues.

Mamdani, an outspoken critic of Israel who has identified as anti-Zionist, was warmly received at the Monday service, where he sat in the front row in a mask and a yarmulke beside Brad Lander, the city comptroller who is a member of Kolot Chayeinu.

Lander, a close ally of Mamdani, recently described the congregation, which was one of the first to call for an early ceasefire in October 2023, as a meeting point for anti-Zionist Jews and progressive Zionists like himself.

The synagogue, which maintains an “open tent” policy on Israel and Palestine, has faced criticism for promoting anti-Israel views in its Hebrew school curriculum in the aftermath of Hamas’ Oct. 7, 2023, attacks. 

In one particularly controversial  lesson, students were instructed to write a letter of apology rebuking their Jewish “ancestors” for taking Palestinian land, fueling concerns among parents who objected to the politicized assignment.

A rabbi at Kolot Chayeinu, Abby Stein, who is a member of the anti-Zionist group Jewish Voice for Peace, also drew scrutiny for attending a meeting in New York City last year with Iranian President Masoud Pezeshkian, days before the Islamic Republic launched a missile attack against Israel.

Mamdani, a 33-year-old democratic socialist and assemblyman from Queens, did not deliver remarks at the Monday evening service. During his sermon, the rabbi accused Israel of committing genocide in Gaza, a claim that Mamdani has frequently made.

Mamdani is now expected to appear at other Jewish institutions during the High Holidays, including a mainstream congregation on Manhattan’s Upper West Side — where he could face a less welcoming audience skeptical of his hostile views toward Israel.

A spokesperson for Mamdani did not respond to a request for comment about his planned outreach to the Jewish community.