Since the joint U.S.-Israeli operation against Iran began last Saturday, Jewish communities worldwide have seen an increase in threats and harassment — including a 95% rise in violent online posts targeting Jews, according to a new report from a leading American Jewish safety and security organization.   

A bulletin distributed by the Secure Community Network to law enforcement on Thursday reports that the ongoing strikes on Iran, which included the killing of former Supreme Leader Ayatollah Ali Khamenei on Saturday, have widespread foreign and domestic security implications.

Iranian ayatollahs Hossein Nouri Hamedani and Naser Makarem Shirazi on Sunday issued a fatwa calling on Muslims worldwide to take revenge for the killing of Khamenei. They told Muslim adherents to “aveng[e] the blood of the martyred leader of the revolution” and added that it “is obligatory for all Muslims.” Additionally, the Islamic Revolutionary Guard Corps issued a public proclamation in Farsi that “the enemy … will no longer have security anywhere in the world, even in their own homes.” 

The U.S. Department of Homeland Security responded in a confidential law enforcement report obtained by Jewish Insider that the fatwas, Iranian government rhetoric and online messaging heighten the threat of violent extremism in the U.S. 

SCN warned that the heightened risk of lone wolf attacks inspired by the strikes may have already begun to play out. Less than 24 hours after the killing of Khamenei, a gunman killed three people in a mass shooting at an outdoor beer hall in Austin, Texas. While authorities are still investigating a motive for the shooting, they noted that there were indicators on the suspect and in his vehicle that suggest a potential terrorist connection: During the attack, the suspect wore a hoodie with the words “Property of Allah” and a shirt with an Iranian flag design underneath. 

Since the airstrikes began in Iran, antisemitic online posts impacting the Jewish community — some of which use explicitly violent rhetoric — have nearly doubled, according to SCN, with 4,322 violent posts tracked in the past six days, compared to 2,211 in the week prior to the strikes. These posts include long-standing “Zionist Occupied Government” conspiracies about Israeli control over governments and influence in the U.S., as well as suggestions that the strikes were intended as blood sacrifices for the Jewish holiday of Purim. 

The Secure Community Network said it has not yet identified any specific threats to the Jewish community or U.S. homeland. In a list of precautionary recommendations, it urged law enforcement, security partners and Jewish institutions to remain vigilant, refrain from broadly advertising events and consider adding increased armed security. 

Retaliatory calls to harm American Jewish communities and facilities, in addition to general calls for “death to America,” have also proliferated online, including in tweets from Columbia University Apartheid Divest, a coalition of over 80 university student groups.