maybe he was more than willing. but we have found no proof that he was doing it. (not 'had ever' but was doing at the time we invaded)
you can go as far back as you like in Osamas past, back to where he recieved help from us. (seems like it was the early 80's when we called him a freedom fighter. but then he confined his terroist activities agains the ussr. thats the difference between a terrorist and afreedom fighter, right? whos side they are on.)
we've sold WMD, as well as conventional arms, we've trained terrorists, that's not the issue.
the issue is was he complying at the time of invasion, and since it was a UN directive that he was required to comply with, did the UN ask us to invade?