Students Supporting Israel founder Ilan Sinelnikov was repeatedly punched in the head at an anti-Israel encampment protest at the University of California, Berkeley, on Wednesday during a scuffle over an Israeli flag.

Sinelnikov told The Jerusalem Post that they faced incitement and call for violence for around 20 minutes. A man who would later attempt to grab one of the SSI group’s flags attempted to rally the encampment against them and called them “Talmudic devils.”