So, are we to think that Krakoa was lawless until the council met? And that only three things can earn you a punishment? There are certain things that can be assumed as crimes in any society. He can't even use a George Costanza defense ("Oh, was that wrong? Should I not have done that? I tell you, I gotta plead ignorance on this thing."). He knew it was wrong. Magneto, one of the big bosses and a dude no one should cross, even told him not to kill anyone. He did it anyway. If he'd been convicted for wearing orange on Wednesday or something random, I'd think that was unfair, but come on.