THe problem with Iraq is they did not comply with UN resolutions from the past 12 years. And the rest of the world let them get away with it.

What good is the Non Proliferation Treaty if it's not enforced?
I took a class on WMD in college 2 years ago and Iraq had back as late as the mid 90s materials and half built weapons (nuclear, chemical, biological) and just "disappeared". If Iraq had been serious about having gotten rid of them they would not have stalled they way they did.