Arguing Blair was not labour is both stupid and dangerous.
Examine his route to leader of Labour party (before PM) and he needed support of majority of Labour MPs, majority of Labour party members, majority of unions and a majority of all socialist societies.
He was Labour but didnt follow labour doctrines but he gained complete support of all mentioned, and kept it, throughout his tenure.
Its dangerous because saying he was not Labour is denying he was a product of the Labour party, which he obviously was.
If May decided to take a lead from Corbyn, introduce social reform and nationalise many industries she would still be a tory, and a product of Tory party.
Saying Blair was a Tory is simply done to deflect the stigma he has produced away from the Labour party. Its a silly argument.
Labour should take responsibility and change to stop such things happening again, which it has. Corbyn has hijacked Labour and it has been allowed to happen to expunge the Blairites (tories?) within the party.
The party has lost direction and will never regain it until this nonesense is stopped and a real Labour party representing the actual social situation of country emerges. It will never happen under Corbyn. Perhaps Milliband??
Its an argument made by people doing so to sound informed and knowledgeable about Blair policies. It is missing the point. He was allowed to use Labour just as Corbyn has been allowed to do.