Given the hard left hounded them out you'd think Corbynites would be happier.
They're not taking any sort of principled stand by leaving. They're doing it for publiciity, because the public are idiots and love people who 'heroically fall on their sword'.
I suppose congratulations are in order to the Blairites. They've successfully undermined Labour's first left-wing leader in years by painting him as some sort of left-wing Hitler (despite the fact he was elected leader both times with over 50% of the vote).
Well, if you want a more pure Labour Party, shouldn't all the Blairites leave, and then get all the votes from more Blairite-minded voters when elections come around?