Please stay on topic. I'm arguing that the war was justifiably initiated because the US was responding to an attack that killed ~3,000 of it's citizens.
I thought I was. It's not justifiable to bomb and invade a whole sovereign nation to capture a few criminals. Especially if that nation is willing to negotiate their extradition for a fair trial. Just like it would not be justifiable for Afghanistan to bomb and invade the US now because a few criminals "tortured some folks" and killed 1000s of its citizens who had nothing to do with 9/11.