It's just so, so easy to go from "false accusations of antisemitism are frequently used to defend Israel" to "all accusations of antisemitism are false". I've been there. In, like, 2015 you could have found me saying that antisemitism wasn't all that serious a problem in the US and Western Europe. And then, you know, gestures broadly. So it's a subject I tend to get a bit riled up over.
