It doesn’t.
“Antisemitic” means, more or less, anti-Jewish.
The Nazis were anti a LOT more people than just Jews - they exterminated the handicapped, were working on the Jews and Roma, and next on the list were Slavs and I’m not sure who after them but I expect the list was longer.
I would also argue that the Russians are currently engaged in ethnic cleansing in Ukraine and ARE intent on destroying that nationality, culture, and people based on what they’re actually doing in Ukraine.
It’s my personal opinion, but I think there are a certain percentage of Israelis that like to think they’re more unique than anyone else and no one’s suffering compares to theirs. Suffering shouldn’t be a pissing contest. Analogies are valid even if comparisons aren’t perfect.
Also, this:
It has been my experience as someone ethnically Jewish, even here in the relatively tolerant US, that anti-Semitics and neo-Nazis do not give a flying fuck if a person is “observant” or “just” a descendant of Jews and now secular or a member of a different religion or an outright atheist. We’re all vermin Jews and thus not worthy of life.
With a small exception for the Evangelical Christians who still despise us but have reserved a role for us as cannon fodder in their fantasies of Armageddon, to take place in a land far away from the US.
Yes, some Ukrainians were Nazi collaborators. Others engaged in pogroms before and after WWII. Pretty much none of those people are still alive and those that are, are too old to be fighting. It’s an excuse, like a man who beats his wife nearly to death because she burned dinner a year ago, and just like that excuse it may or may not be true and even if there is some truth to it, it in no way justifies the crime committed.