Zionism is the fascist movement within Judaism (although many Jews reject it being associated with Judaism at all). Being against Zionism is no more anti-Jewish than being against white supremacism is being "anti-white". That's how that actually works. Jumping to accuse anyone criticizing Zionism as being "antisemitic" is just a lazy, intellectually dishonest smear that everyone sees through, and you should stop polluting conversations with it.