I would say using judeosupremacist or judeofascist is a fine way to describe Zionism. After all, yiddish newspapers in the 20s often compared it to "Hitlerism". But that is unrelated to the fact that "goy" is itself a completely neutral word simply denoting non-Jewish. You trying to turn a common and mundane word into a secret word to mean some sort of Zionism is not just fucking stupid, it's dangerous.