One thing I’ve heard is that those on the left who support all forms of national liberation but that of the Jews, in Israel, are anti-Semitic, or at least hypocritical.
Most simply, there is nobody on the left who supports all national liberation struggles. That’s just a myth. Some struggles are perceived as illegitimate for one reason or another. For instance, the Hmong people were recruited by the CIA to fight on the U.S. side in Vietnam. They had national aspirations. Nobody on the left supported them, for obvious reasons.
National liberation (NL) cannot be separated from context. Liberation from what? With what consequences? Similarly anti-Zionism today cannot be separated from the historical developments in Israel/Palestine. A different development I submit would provoke a different sort of antiZionism. A benign one that respected Palestinian national aspirations could indeed reduce anti-Zionism to a crank anti-Semitic fringe, but that isn’t the reality.
There are many on he left who disdain any sort of NL. So there is nothing hypocritical or inconsistent about their anti-Zionism. This includes anarchists who not only oppose NL but oppose states of any type, on principle. Like Chomsky.
You could interpret anti-Zionism as inflexible opposition to a Jewish state under any circumstances, while simultaneously endorsing the NL of others. Maybe some on the left are guilty of this. Alternatively you could imagine anti-Zionism as I do: Zionism is what Zionism does. What it’s doing now is unacceptable to me, ergo my anti-Zionism. If Israel allowed a Palestine, I’d preoccupy myself with other things. I think most others would too. Any remnant could be legitimately scrutinized for anti-Semitism.
It’s not so complicated. In light of Tibet’s treatment at the hands of the PRC, I’m inclined to be sympathetic to Tibetan national aspirations. If however Tibet exhibited murderous intent towards some internal minority, not so much. The Kurds are a classic example of an imperialist project, yet I have no problem supporting their independence. It seems by far the preferred outcome.
Zionism has outlived its legitimacy as NL. Israel has already been liberated. Now it needs to be restrained from evil deeds.