That's not a recent developement, the jews have been for the left what muslims are for the alt right since at least the 90s.
It's completely fucked up. You tell people you're a jew or have one single jewish grandparent and next thing you know you have to defend yourself for whatever bullshit is happening in Israel.
This happened all to often when I was moving through the german Punk Rock / radical left / squatter scene in my teens and early 20s.
it is frightening for sure
things that happen to Jews on the left would be shouted down by those same leftists if the right were responsible
I remember when Trump tweeted out some anti-semitic bullshit and his excuse was to say that the star of david was a sheriff's star.
so that's a sheriff's star
and this is an Israeli/Zionist star