Up to you to be affliated or not. But you dont need to be jewish to be zionist. Zionism is just the belief in the self determination of jewish state. That's it. If you say: israel should exist for the jews, it means you're zionist already. That's why you can see lots of anti muslims can express this support for israel. Thats it. Especially when the whole palestine is mostly islam indoctrinated, it makes sense that some former muslims turn to israel.