Do you know that you are basically saying the USA attacked Iraq because they KNEW they wouldn't retaliate with WMDs. Guess how they knew that?
And if one of you wants to add that they were attacking because Iraq was attempting to make them needs to seriously pull his/her head out of their ass.
E.g. Tony Blair said that Iraq could dump a WMD on the UK in less than an hour.
And they're not stopping other countries from acquiring WMDs anyway.
It's a bit of an extreme theory but the Americans seem awfully bent on making themselves the only WMD-having country in the world. It is actually not their business if other countries acquire nuclear weapons. If they can have them, why can't the others? For their own safety?
Put yourself in the shoes of one of those other countries for once. NOTHING is keeping the USA from opening a can of whoop-ass on them.
I hope you know the saying: Improve the world, start with yourself.