Writing in The Times Philip Collins has some down-to-earth analysis on the Jeremy Corbyn phenomenon: http://www.thetimes.co.uk/tto/opinion/columnists/article4506657.ece
"Labour party members are pretty angry with the electorate" (and presumably plan to punish the electorate by making them swallow Jeremy Corbyn, much as a waste-not-want-not Victorian matriarch would keep serving up a meal cold until her errant children ate it).
"The Labour party... is drunk on the lack of power".
"Only 5 per cent of Mr Corbyn's supporters think he can win a general election".
But if you are an aficionado of political biography you will know that the same sort of things were howled by "moderates" in the Tory party back in 1974 when Margaret Thatcher dared to stand against Willie Whitelaw.