Israel/Palestine

First one does not have to think that all Jews think the same to accept that anti-Zionism is antisemitism. Do all Italians think the same? Of course not. Would almost all of them think that you were anti-Italian if you argued that Italy had no right to exist? Of course they would. Second, in fact most Jews do agree on the issue of Israel's existence. The only ones who don't are groups like True Torah Jews and Neturei Karta, which are maybe 1% of the world's Jews, or else Leftists of Jewish Parentage. That is people who are nominally Jews, but whose beliefs come from Leftism and not Judaism. In other words, the vast majority of Jews believe in a jewish people that has national rights like other peoples. Since most anti-Zionism is based on a rejection of Jewish national rights it is per se antisemitic.