https://en.m.wikipedia.org/wiki/Jonathan_Greenblatt
Following Elon Musk's announcement he was buying Twitter in 2022, Greenblatt praised Musk as an "amazing entrepreneur and extraordinary innovator" and "the Henry Ford of our time". Car manufacturer Henry Ford was one of the most prominent antisemites in the history of the United States. Greenblatt had previously criticized Donald Trump for praising Ford. Greenblatt apologized for the comparison, saying that "Admittedly, the Henry Ford reference was wrong even though he was an innovator in the automobile industry. I certainly was not trying to praise Ford and didn't intend to minimize his contemptible antisemitism in any way."
In November 2023, Greenblatt again praised Musk, lauding his "leadership in fighting hate" after Musk said that X would suspend accounts which used the phrase "From the river to the sea, Palestine will be free." Greenblatt's praise of Musk came a day after Musk endorsed an antisemitic tweet which said "Jews push the exact kind of dialectical hatred against whites that they claim to want people to stop using against them." Musk had also supported "#BantheADL", a campaign driven by white nationalists. Greenblatt was criticized for his comments, including by employees of the ADL. Greenblatt later defended himself by noting he had criticized Musk's antisemitic post "right away", having called it "indisputably dangerous." Greenblatt said that "It's important that he made a good policy decision and announced that he was no longer going to tolerate language … genocidal language that call to eradicate the state of Israel and annihilate the 7 million people who live there." Greenblatt further said "I'm not saying 'Oh, he's off the hook because he said this on Friday,' or 'Oh, he'll always be bad because he said this on Wednesday.'"
When Musk gave a gesture resembling a Nazi salute in a speech following the second inauguration of Donald Trump, Greenblatt again defended Musk, saying "I think it was an awkward gesture. I don't think it was intended to be a fascist salute."
Greenblatt has expressed support for activist deportations in the second Trump presidency. In a June 2025 speech before Republican state attorneys general, Greenblatt said that the "real deal threat" to American Jews came from "this convergence of what I call the radical left and, like, Islamist groups here in the U.S.". Greenblatt compared pro-Palestinian student protesters to ISIS and Al-Qaeda, and said regarding Mahmoud Khalil, "I am sure we're going to find out about his ties to groups overseas." In an appearance on Fox News, Greenblatt said that college graduates and social media influencers who criticized the Gaza genocide were responsible for the Boulder fire attack, and falsely accused graduating MIT class president Megha Vemuri, who had criticized MIT's ties to Israel, of spreading "blood libels".
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