A professor at Columbia University in New York accused Israel on Tuesday of being behind every calamity in the world, and asserted that Zionists who oppose the 2015 nuclear deal with Iran are disloyal to the United States.

Hamid Dabashi, a professor of Iranian Studies and Comparative Literature at Columbia, wrote on Facebook, “Every dirty treacherous ugly and pernicious act happening in the world just wait for a few days and the ugly name of ‘Israel’ will pup [sic] up as a key actor in the atrocities.”

His post linked to a New York Times article claiming that unidentified critics of the nuclear agreement with Iran hired Black Cube, a private firm founded by former Israeli military intelligence analysts, to gather information on a top aide to President Barack Obama and his family.

The professor also denounced “opponents of the Iran Nuclear deal” as “diehard Fifth Column Zionists working against the best interests of Americans and for the best interests of Israelis.”

Accusations of dual loyalty against “Zionists” are frequently employed by neo-Nazis, including former Grand Wizard of the Ku Klux Klan David Duke, who in 2012 said that “Israel and the Zionist fifth column in government, big media and finance” support a war with Iran.

The International Holocaust Remembrance Alliance’s definition of antisemitism, which has been adopted by the US and 30 other member states, includes “accusing Jewish citizens of being more loyal to Israel, or to the alleged priorities of Jews worldwide, than to the interests of their own nations.”

According to the Anti-Defamation League, a leading Jewish civil rights group, charging Israel with involvement in every catastrophe in the world may also be antisemitic.

Jonathan Greenblatt, national director of the ADL, explained in 2017 that assertions where “often all the problems of the [Middle East] and even the world are attributed to the Jewish state … are case studies of anti-Semitism, even if the perpetrators attempt to wrap their intolerance in the guise of fighting systemic racism or seeking social justice.”

Read More: Algemeiner