It boils down to the systemic reason of the existence of widespread anti-Semitism in Europe : the building of the nation-state. Jewish people, just as nomadic people of europe, were a community that existed beyond borders, so they threatened the notion of a nation state like nobody. Typically, the jews were seen as "untrustworthy" precisely because they had "no nation".

To make a parallel, this is the same reason trans and gay people are being persecuted, because they threaten patriarchy.

So back to Zionism, the anti-Semitic nation states of Europe wanted the jews out because they showed how arbitrary their existence ultimately is. But how? A solution was found with the most self-hating members of the Jewish community. They wanted to address the "problem" of being a people without a nation-state. They had internalised anti-Semitism and were ready to use colonialism to renounce what made them special. So that way, anti-semites could send the jews "back where they belong", and eventually see them as expatriates from Israel rather than true citizens of the country they lived in, which didn't threaten their nationhood anymore.

So basically as long as Isn'treal exists, Jewish people are forced into a position of renouncing their special revolutionary potential as a people beyond borders. Support for zionism is an attempt to erease Jewishness, to make them exactly like the whites and most importantly to deny that they belong where they live, to treat them as expatriates even if they lived in Europe for centuries

Lil_tank gave a good response but one telling giveaway is the antisemitic moral panic that Israel generated in the West where real cases of antisemitism were drowned out by Zionists calling any antizionist Jew a "auto-antisemite"

Also Israel collaborated with the Nazis which I think is antisemitic but I'm sure the CEO of Judaism ("Israel") can correct me on this one /sarcasm.

The reason you don't talk about it because antizionist Jews are in danger of being hate crimed and ostracized by their Zionist peers and family. It is a death cult of anti-Jewish thought that runs counter to all of ancestral Jewry that was enabled by the same antisemitic west that led to the european shoah.