You are dellusional.
If a risk to the US is what would have justified invading Iraq in your mind, then you are simply lying to yourself by claiming that there was no "risk to us".
Any outlaw regime like Hussein's, with the access to wealth such as it had, and an axe to grind against the U.S., which he had, is a potential risk to us by the mere fact that at any time it can finance people like Usama bin Laden.
You may not find my answer acceptable, but that's your problem, not mine.
Geez, Luis, almost 200 posts into this thread and someone finally summed it up well.
A libertarian who wants to surrender the security of the country to the UN? That's a new one to me.