Labour Leadership 2016

Unfortunately there is also a small, but extremely vocal, minority of Corbyn supporters who are relatively new to the Labour Party and have found themselves promoted within the party over the last few months to back-office positions of relative authority.
For some of them, it has gone to their heads and they dismiss anyone who even mildly disagrees with them as Blairite Scum. Moderate party workers find them very shouty and difficult to work with, complain that the Momentum crowd are unwilling to compromise on anything and eventually give up and move on, leaving holes in the organisation which are filled with more young corbynistas.
Behind the scenes, some of the new SPADs are basically Rik from The Young Ones.

and

There's about 100 new Labour MPs from the 2010 and 2015 elections, who were not put there by Blair's leadership. Most of them agree broadly with Corbyn's politics. Most of them also voted no confidence in him as leader.

I missed this. I think these are good points.