A Labour party that elects a left wing leader having just been defeated by an outright majority victory by the Tories is counter intuitive and may render the party obsolete come the next general election. It will, however, make politics interesting in the intervening period.
“I disapprove of what you say, but I will defend to the death your right to say it. - rumoured to have been said by Voltaire but more likely stated by Evelyn Beatrice Hall. Either way if Voltaire didn't say it he should well have done so.