Donald Trump Jr. retweeted Kevin MacDonald, a retired psychology professor that the Southern Poverty Law Center has called “the neo-Nazi movement’s favorite academic.”

On Monday evening, MacDonald retweeted a post from Megyn Kelly, who was quoting political pundit and attorney David Wohl on Hillary Clinton’s alleged use of the State Department as a “business partner” with the State Department.

MacDonald added to the retweet a further suggestion that Clinton had exchanged business favors for cash with the banking company UBS.

Donald Trump Jr. then retweeted MacDonald’s message.

Image by twitter Donald Trump, Jr., retweeted prominent anti-Semite Kevin Mac Donald.

MacDonald has argued that anti-Semitism is a “logical” response to Jewish control of the media and world financial systems. MacDonald has attributed Jewish motivation to control societies in which they are the minority as an “evolutionary strategy,” one that can explain Jewish liberal politics.

“Not since Hitler’s Mein Kampf have anti-Semites had such a comprehensive reference guide to what’s wrong with ‘the Jews,’” wrote Heidi Beirich, director of the SPLC’s Intelligence Project, in 2007.

Trump, Jr.’s retweet of Kevin MacDonald led to dozens of replies with racist imagery in support of the retweet.

“Doc Mac finally getting the cred he deserves,” wrote @BenChadpiro.

“Donald Trump Jr retweeting Kevin MacDonald will send some (((people))) bananas. Cheers!” wrote @Harampepe.

Contact Ari Feldman at feldman@forward.com or on Twitter @aefeldman.