A Zionist, properly defined, is simply a person who believes that Israel has a right to exist and defined herself the way any nation does.
The problem is that the modern nation-state of Israel has been dominated, almost from the beginning (1948,) by extreme Zionists who believe in a Greater Israel. They are expansionist and racist, and NOT representative of the Jewish people as a whole...but sadly, they are the ones with the most power and money.
It is the Jewish people's problem to figure out how to redress their leaders' crimes, just as it is ours, to/against ours.
I am no fan of so-called "international courts."