It should be mentioned again & again that this was started because Jewish Labour Party members felt unsafe in their own party & felt it was a hostile body.
There were a lot of Jews inside and outside of the Labour Party who went to bat for Corbyn. It didn't matter because the narrative has already been written.
Seriously, maybe I feel more comfortable disputing this because of my Judaism, but I've pored over this and I can't find any evidence at all to indicate there was ever a rampant problem with anti-Semitism in the Labour Party under Corbyn. Some unfortunate choice of words, maybe, but it's fairly apparent Corbyn is absolutely correct: this is a political snowjob. This is becoming a fairly common tactic of the global far-right: project their own anti-Semitism on the opponent and use it to take them down. We're seeing in the US with a few people in the House of Representatives being accused of it because they want to hold Israel to account for the ongoing settlements.