A conspiracy theory circulating in the Arab world holds that the Muslim Brotherhood is secretly allied with the Jews, the Anti-Defamation League said.

“It would seem that no allegation made against Jews and Israel is too absurd when it is used to discredit others,” ADL National Director Abraham Foxman said in a statement.

Protesters were shown in a television broadcast last Friday chanting “Khaibar, Khaibar, oh Jews, the Brothers (Muslim Brotherhood) are the Jews,” according to the ADL, which explains that the slogan is meant to evoke an Islamic story of a battle between the Prophet Muhammad and the Jews in the town of Khaibar.

Also, Dubai Police Chief Dahi Khalfan, in a Twitter campaign aiming to discredit the Muslim Brotherhood, recently alleged an allegiance to Israel and Jews.

“However bizarre and ludicrous, it is an increasingly popular conspiracy theory that the Muslim Brotherhood is a Jewish production to destroy Egyptians,” Foxman wrote.

Among other tweets to his 30,000 followers suggesting a Muslim Brotherhood connection to Jews, Khalfan has retweeted a link to a YouTube video titled “The Jewish-Muslim Brotherhood alliance and the project of establishing Greater Israel.” The video accuses Jews of using the Brotherhood to achieve their goal of controlling Muslims and establishing a greater Israel.