A couple of issues with that Dave. Firstly, do you really believe the Middle East is a factor behind people becoming members of the Labour Party? Secondly, do you believe the membership is reflective of the Labour electorate? Lastly, wasn't it the Blairite rump of the party that delivered the best electoral success the Labour party has ever had, and some might argue saved it from the oblivion of the Foot/Kinnock years?
Seems a bit revisionist to laud the 30 seat gain made by Corbyn and deride the 148 seat gain made by Blair. It was the kind of jump last seen under Atlee.
And this was despite May being the worst leader in living memory. Corbyn did well in London, where most of his cabinet are from, and the north-west and north-east, which would presumably require hell to freeze over before voting Tory. Scotland was still lost, as were vast swathes of the country. This notion that he's the best thing since Napolean I find baffling.