Something Amyss said:
The problem is Tony's like a guy who keeps hitting his wife and then feeling really bad about it afterwards.
I won't be at all surprised to find Mr Accountability breaking the rules within Civil War. He'll say we need to be held accountable and then do something that flies right in the face of that. He practically can't help himself. And then he'll sober up, look at the bruises, and be all "my god, what have I done?" again.
Holy crap. Called it. Not only does he go rogue on Bucky and Cap, but he decides to ignore the escape of his friends. He's ostensibly on the government's side, but willing to violate that for personal reasons.
And I understand the bit about Bucky killing his parents. Not saying I'd try and murder my friend and his sidekick over it, but I get why he'd change his mind. But he went to war to hold Cap's side accountable, and while still working with the government, he turns a blind eye to their escape. And I'm not sure this is the best interest of humanity. I think this is the best interest of Stark.
Oh, and also he explicitly doesn't care that Bucky wasn't in control. That's not justice or the best interest of humanity. That's vengeance, and the guy who preached accountability for others deciding to murder someone.
Also, what he advocates with Scarlet Witch is totally not cool.