Anniebach stop constantly going on about Blair, he was a deeply unpleasant man, but he made the Labour Party electable even he later corrupted it. Calling every MP who disagrees with Corbyn a 'Blairite' is lazy thinking.
Will you call everyone who disagrees with the next leader a Corbynite, even if you previously accused them of being a Blairite?
The Labour Party has to decide whether it is all for ideological purity and appealing only to its committed supporters or whether it wants to be representative of the population as a whole so that they win seats and stand a chance of forming a government.
Any leader of any party, right wing, left wing or centrist, who gets lower and lower ratings in the all the polls and is seen as a laughing stock by the elctorate, is a millstone round the neck of his party and needs to be replaced. Corbyn is in that situaation.