The thing is that Israel is currently engaging in genocide, and claims to be doing it in the name of Jews everywhere. The same way anti-Muslim sentiment increased in response to Muslim terrorism, antisemitism rises when people use that religion as a justification for killing people.
Just to be clear, the current wave of antisemitism is not justified, it’s a bad eye-for-an-eye thought process, but people are stupid and people are outraged with the genocide Israel is doing. It’s the same line of thought as ACAB; if local Jewish communities also condemn genocide, why are they not publicly and harshly denouncing Israel for it?
In order for this not to happen, Israel would either have to stop claiming to be the representative of Jewish people worldwide, or stop engaging in genocide.