Interesting and thought provoking thread. Just wish I had discovered it sooner.
Corbyn wants to step down but McDonnell is urging him to hang on a while longer.
My take is this is for ideological reasons. Once JC goes the party will be moved back towards the centre which his and supporters are desperately trying to stop.
Another thing to add is why is JC consistently portrayed as a man of principal? Labour MPs who have spoken up against him have been subjected to quite horrendous vitriol on social media. Including threats to them and their families, which coming barely more than a fortnight after Jo Cox died beggars belief. However, instead of trying to distance himself from Momentum and their like JC stokes to fires by continuing to attend their events.
Also, this may well have been mentioned by JC and his supporters seem to have a distorted view of democracy. They believe that the democratic view of party members should be upheld and that therefore JC shouldn't quit. However, Momentum calling for dissenting MPs to be subject to mandatory re-selection seems to be ignoring the democratic view of the wider election.