There's nothing supremacist about Zionism, it's just the support of Jewish self-determination. Efforts to twist it into something nefarious are just propaganda with no etymological basis.
Think about what you're saying. Zionism the idea that a particular ethnic group (the Jews) will have the authority to determine what happens in their country (Israel). That is a textbook case of ethnic supremacism. And that's not even mentioning the violent expulsion of the Arabs that this de facto entailed.
Most Zionists have a goal of preserving a Jewish majority for pragmatic reasons - history has shown that it's the only way to ensure the safety of Jews. That's not a supremacist ideology at all.
Moreover, no country is perfect, and we shouldn't have double standards just for Israel. Can you identify any other Middle Eastern country that compares favorably, in terms of diversity and tolerance of all religions and ethnicities?
"Judaism" sometimes refers to the religion, but many Jews are not religious. Jews are a group of people from Judea, hence its historical name. Some dispersion to other regions doesn't change where a group of people is from.
And think about how absurd it would be for anyone on the planet to go murder Africans and steal their land under the guise of it being our “homeland”. Sadly that has happened, but they didn’t bother to use that excuse.