I must admit I don’t get why Israel or Jews worldwide need Zionism anymore, Zionism was about establishing movement among the Jewish diaspora to create a Jewish homeland, well they have succeed. What do they need Zionism for anymore?
They would doubtless reply that it is about continued support for that homeland?
You don’t need some kind of ideology for that, I don’t need a specific ideology to support my homeland and I don’t need a specific ideology to support other countries.
That's because in the west we don't tend to have large political movements opposing the very existence of our countries. The word "Zionism" basically just means "supporting the existence of Israel"; if everyone agreed with that then there would be no need for the word, but not everyone does agree.