It's not fake news. There are links to the documentary and a summary below. Corbyn is not sufficiently pro-Israel for them.
http://www.middleeasteye.net/news/is...byn-1016879568
https://www.youtube.com/watch?v=ceCOhdgRBoc
Do you think it is a coincidence that the most anti-Corbyn MPs are all in Labour Friends of Israel. Just look at some of the anti-Corbyn antics of some of these people. They have even heckled their own party leader during Prime Minister's questions. Just look up the anti-Corbyn actions by MPs like Mike Grapes, Louise Ellman, John Mann and Joan Ryan.
The fact that Labour voters in Stoke were even willing to vote an obvious idiot into Parliament the other day shows that rank and file Labour voters still support Corbyn. They were voting for Corbyn not the idiot.