The protesters wore black shirts reading "Not in Our Name" and held up placards demanding Israel halt military operations in Gaza.
"If the only time you take to the streets is to stand against the only Jewish country in the world, you're not a freedom fighter, you're not a liberal, you're just a f***ing antisemite," they say.
Deputies asked the public for help in what it called "an active and ongoing investigation."
Two teachers have been removed from the school and the principal has been placed on leave at Citizens of the World Charter School-East Valley, announced Melissa Kaplan.
Critics of Israel’s war in Gaza say the film is being used to justify ongoing bombings there that some of them say is causing a “genocide” there.
“When a man who’s in his 60s gets pounded in his face for standing up for Israel, every Jew needs to do something,” one Jewish father told JTA.
A video capturing part of the event was posted to the social media platform StopAntisemitism, as well as a photo of the alleged attacker.