Then: the Iraqis were required to fully account for their WMDs, and to ensure that they were destroyed under international supervision.
Now: After 12 years of reneging on their word, they got their a$$es whipped. Shiite happens.
They had an affirmative duty to fully account for the WMDs that they had admitted to having. The United States did not have that duty, the IRAQIS did. They did not do so.
Thus violating the conditions of the cease fire. If we hadn't finally ended the 12 year charade, who would have?