Stainsey, I said let you have the case against Corbyn on antisemitism. As I have said, Corbyn's antisemitism does not involve overt acts like burning down synagogues. It's aggression and threats and turning a blind eye carried out by his "supporters", sometimes close supporters. A fish rots from the head down, and it's Corbyn's failure to act against racist threats against Jewish people (particularly Jewish MP's) that is seen as implicit approval.
This recent BBC post is a good summary of the case against Corbyn:
https://www.bbc.co.uk/news/uk-politics-45030552
To summarise:
1. Jewish Voice for Labour said in the past 10 months, 453 cases of antisemitism have been investigated in the Labour Party, yet close Corbyn ally Chris Williamson said Labour had been over apologetic. Corbyn was reluctant to remove Williamson until put under pressure by the likes of Tom Watson.
2. Luciana Berger has, in the words of Watson, been bullied out of the party by racist thugs. Corbyn did nothing. Berger needed a police escort when she attended the Labour Conference in 2018. Corbyn did nothing.
3. Corbyn refused to comply with the Holocaust Remembrance Guidelines, so watering down the definition of antisemitism
4. Corbyn accused British Zionists of "no sense of English Irony."
5. In 2014, Corbyn honoured the terrorists that tortured and murdered 11 Israeli athletes at the 1972 Munich Olympics.
6.Corbyn sent a supportive message to the artist responsible for an obviously antisemitic mural in 2012
7. Corbyn ordered disciplinary action against Jewish MP Margaret Hodge when she claimed he was antisemitic, rather than trying to understand her complaint. The action was later quietly dropped.
Watson acknowledges the antisemitism in the Labour Party. Even Mcdonnell does. Corbyn ordered a review by an insider, Shami Chakrabarti, who delivered what is widely seen as a whitewash and was rewarded with a seat in the House of Lords.