Someone has just slagged off 'Corbyn supporters' on the basis that they're new joiners who probably won't pull their weight canvassing at a general election, while the longstanding members will have to do all the heavy lifting of campaigning for a potential PM they don't believe in. Someone else has just said, well, it might help you to form a cohesive campaign if 9 months on you weren't still describing members as 'Corbyn supporters' and 'non-Corbyn supporters'.
The Labour Party needs to realise they need both.
Campaigning IS NOT just done door to door now (in case anyone on MN hadn't realised this yet ...) Social media has a massive part to play in sharing ideas.
FWIW, I don't think the JC can win an election. I however, don't necessarily think that's a bad thing for the party and I don't necessary think that's bad for UK politics and the country as a whole.
Also I don't necessarily think that exclude Labour from the next government. I think the next general election will be messy.