NEW YORK - Billionaire hedge fund manager Daniel Loeb lashed out Sunday at Hasidic journalist Jacob Kornbluh after Kornbluh defended New York City Mayor-elect Zohran Mamdani, whom Rep. Elise Stefanik described at the Zionist Organization of America gala Sunday night in New York as a "dangerous antisemite," "jihadist," and "communist."

Kornbluh, a political reporter, posted on X that Mamdani "is not" any of those things, prompting Loeb, founder of Third Point LLC and a major donor to pro-Israel causes, to respond sharply: "The capacity of certain Jewish individuals for self-hatred no longer surprises me. My diagnostic tool to identify such people is a simple question: Can you name the Parsha of the week and briefly summarize?"

Loeb linked to the "Simchas Torah Challenge," a Torah-learning initiative, suggesting religious study as a "remedy."

The exchange drew attention online, highlighting divisions within the Jewish community over how to confront Mamdani, a democratic socialist whose positions on Israel and Gaza have sparked controversy.

Loeb, a prominent Jewish philanthropist who has frequently criticized progressive Jewish figures for what he views as moral confusion or silence in the face of antisemitism, has an estimated net worth of $4.6 billion.