He is though, along with Bush. A five year old could see they were lying about WMD, biological weapons and the rest. Blair didn't have the balls to stay out because UK is a vassal state.
So yes, they broke away from teh UN security council ruling. Cameron, May and Johnson all voting for it makes them war criminals too, he was enacting parliaments decision. But lets just be honest about that too, Russia and China wanted control of the oil in that region and would never, ever have supported action. Some other countries had deep reservations about the behaviours of Saddam, his thwarting of weapons inspectors, his goading of other countries, his allowing his people to take the brunt of economic sanctions and starve, while he sat in his gold palace and of course, his brutal murderous behaviour towards his own people.
Lets also not pretend that Saddam wasn't a murderous b****d, and try and imagine how many people would have died, had Saddam continued as leader of Iraq, when the arab spring hit, and his absolute authority was questioned, we would have had another gassing of the Kurds, more beheadings, possible civil war. The country was a tinderbox, and would always be while he was in charge, because he was a dictator. No one ever talks about how many Kurds, and Shia muslims were not murdered when he was deposed?
All I'm hearing is that those that point the finger at Blair are completely comfortable with Saddam Husseins brutal murders, conservatively guestimated at 250k of his own people, plus the 1.4mill that died in the Iraq-Iran war, plus the people he killed invading Kuwait. Who knows, if he was allowed to remain in power for another 10 years, he probably would have broken through the 2.5mill deaths. But you know Blair didn't kill those people, so who cares, right?