Whats the difference between zionism & apartheid?

Zionism is the idea that the Jews deserve their own homeland. It has come to mean the support of Israel, not Judaism itself. In fact there are many Jews today who are not Zionists (like myself).

Apartheid is the system they used to have in South Africa where blacks and 'coloureds' (mixed race people) were specifically excluded from some rights of citizenship, second class citizens. It has come to mean, more generically, any system where a class of citizens is disenfranchised, put at a disadvantage.

I think the govt. of Israel treats the Palestinians very badly, but that's not like apartheid because they are not Israelis, they are a different nationality that just used to live on the same land. Even considering them as such is bad, I think. So Zionism and Apartheid do have that in common, the mistreatment of a disempowered minority, but otherwise they are not the same thing at all.

Well apartheid's simple definition is: "racial segregation; specifically : a former policy of segregation and political and economic discrimination against non-European groups in the Republic of South Africa".

Zionism is an international political movement that supports a homeland for the Jewish people in the Land of Israel.

The difference is Zionism refers to Israel nationhood and Apartheid refers to South Africa.

Zionism is for the promotion of Jewdiism and apartheid is the general division of a society by some arbitrary attribute (such as race), where one in the division suffer greatly.