The definition of UN should be simple enough:

In common language, “hate speech” refers to offensive discourse targeting a group or an individual based on inherent characteristics (such as race, religion or gender) and that may threaten social peace.

A related reading would be the paradox of tolerance, which goes far in explaining why we do not want this shit anywhere near our communities.

As for anti-Semitism, I've seen some of it in response to Israel's ongoing genocide, and of course the current context makes both anti-Semitism and anti-Muslim sentiments a very real problem. However, I think people on here mostly seem to be able to distinguish Israel and Judaism, and when they don't it seems moderators are generally doing a better job than on most platforms in my experience. But I doubt you're here in good faith, so I don't see much point in discussing something like this with you.

That's a pretty mainstream belief for a lot a people who have been completely ostracised and discriminated against by the fediverse as a whole.

If you feel discriminated against because people don't want you around, feel free to vote with your feet.