The only people who benefit from antisemitism are Zionists who want to make people flee to Israel. There’s zero tactical or strategic value for a left-wing that’s otherwise built on intersectionality. With some of the most knowledgeable and prominent Anti-Zionists being Jews, it would be nonsensical for anyone at that protest to be against their allies. Liberal co-option of the protests is when we’ll see actual antisemitism creep up.