Serious question for British posters

I remember watching some of the campaigning when Tony Blair was re-branding the Labor Party, and then watching some of the PM Questions when he first became PM. He seemed to have broad-based appeal and support. And now, at least from most of the posts here, he is treated like a pariah. Help me understand the complete turn around. Is it just a case of the honeymoon wore off? A break from Thatcherism was welcomed regardless of whom it was? Is it because he sold his integrity to Bush & Cheney? Or is it his support of the EU? All of the above? I can't think of a comparable swing from hero to zero in American presidents since Jimmy Carter, but then he has repaired his reputation in his post-presidency activities while Blair seems to only dig himself a deeper hole.