There's no way that disheveled and confused old man was personally or solely directing the resistance campaign against US occupation of Iraq. Whatever structure (if any) is organizing the attacks still exists and the war continues on. Capturing this man is no more an end to hostilities as toppling his statue.
Like khudirambose, I hope he gets a fair trial in a neutral nation. The Hague is the correct venue for this.
Hurray, we captured a criminal. Go us. Now let's stop being criminals ourselves and get on with doing the right thing by the world. Fat chance.