I was always more than a little dubious about the whole Excellent Iraqi adventure. But, still - I was ready to be convinced. There were liberal hawkish people who had read Ken Pollack's book and believed Saddam was a looming, if not imminent threat, and we'd have to deal with him eventually so we may as well deal with him now. Others had their "Colin Powell Moment" - that moment when their misplaced trust in Colin Powell caused them to uncritically digest the lumps of shit he handed to them, leading them to cower under their beds in fear of Ricin being delivered into their homes on the wings of 3 foot long balsa planes.
I never was convinced. I understood that some were, but I never understood how anyone could trust this lot to pull it off. The runup to the war demonstrated that they were equal parts dishonest, corrupt, and incompetent, and the experience since then has only validated this evaluation. As time goes on, it's hard to comprehend how anyone can believe that these were the right men for this job, even if you believed in the job.
See Calpundit and Brad DeLong for more.