Jeremy Corbyn has a speech mannerism that could prove fatal: he is very fond of the construct 'I believe X because of y'. Which is great, we need people to have reasons for what they say. But what happens is the media drop the rationale and pump up the first bit and bingo, we have a Jeremy who is against shooting to kill terrorists (not one who is unhappy because of the escalation it can easily bring). And a Jeremy who regrets bin laden was shot, not someone who thinks it would have been better if he is brought to trial.

The damage for those has been done, and will as you say come up in the next election. But he really does have to find a way of phrasing the same thing which is not so easily turned against him.