Much like the massively exaggerated infestation of 'anitsemitism' in the Labour Part as a whole, which was used by the party's establishment to undermine and weaken Corbyn, even if this meant letting the Tories in again; the right are pretending that Corbyn's mere existance as an MP, could prove fatal to Labour's election prospects in key marginals.

Corbyn will find himself both isolated and alone, facing the resources of the Labour Party determined to destroy him regardless of the cost. He, in contrast, won't have many friends and he won't go on the offensive, which means explaining why he's being targetted and the fact that the party has been captured by what amounts to another Tory faction, pretending to be Labour. So, ideologically he'll be fighting with one arm tied behind his back. Once again he'll be out of his depth, because he lacks both intellectual and rhetorical qualities. It's a bit late for him to suddenly realize what he's up against and take action, if he didn't understand and act when he was leader.