I would say anti-Zionism is a form of anti-Semitism. It's a very particular one.
I would say—but of course what Michael says is true—once you're Jewish you're suspected of being Zionist and so the anti-Zionists impose a wide range of violations on Jews as suspected anti-Zionists, perceived anti-Zionists complicit in the crimes of Zionism, whether that's real or not.