That was an intelligence community failure, not deliberate W. lying.
You are, of course, referring to Saddam Hussein.
Hussein had led a secular government, but it was dominated by members of Iraq’s Sunni minority and it brutally repressed opposition. When Saddam was ousted, power went to the majority Shiites, who wanted revenge. There was a growing perception among Sunnis that they were being persecuted and excluded from power by Shiite officials. AQI recruited Sunni fighters to its cause – trying to establish a Sunni Islamist control of the country.
Hmmmm … seems like they are.