(JTA) – The Anti-Defamation League (ADL) condemned Nation of Islam leader Louis Farrakhan as the “leading antisemite in America” after a speech in which he blamed “Israelis and Zionist Jews” for the 9/11 terrorist attacks.

Farrakhan, who has a long history of anti-Semitic remarks, delivered his speech on March 1 in Chicago as part of his Saviors Day 2015 sermon. “It is now becoming apparent that there were many Israelis and Zionist Jews in the key roles of the 9/11 attacks,” Farrakhan said. “If they can prove me wrong, I’ll pay with my life, since they want to kill me anyway. Prove me wrong. We’re dealing with thieves and liars and murderers.”

Some of Farrakhan’s other claims relating to the Sept. 11, 2001 terrorist attacks include that “an Israeli film crew dressed as Arabs were filming the Twin Towers before the first plane went in” and “many Jews received a text message not to come to work on Sept. 11.”