1.Didnt France, Russia and America give armements to irag in the first place, when they werent seen as a threat.
2.WMD's are easily availiable since the soviet union broke down (nuclear rods for reactors can be found in fields near bases, these can be used to make dirty bombs) So even if iraq had never started A WMD programme terrorists could still easily make a dangerous bomb.
3.Im not sure if those figures at the start included casualties or kills from other countries militaries.