Because Saddam "tried to kill my father, man", and Bush "don't play that s---."
Yeah, I said in another post that while it's unclear to me whether it was conscious or not, Bush's core reason for starting the war was to avenge his father. WMDs and Saddam's bad behavior were just excuses and/or rationalizations.
I was just quoting, in jest, a line from Chapelle's Black Bush skit haha. Imo avenging his father isn't a great reason since obviously there were neo-cons like Cheney, Rumsfeld, etc. that were stronger voices for the Iraq War than W. Bush himself. The buck stops with Bush of course, but I think the Bush admin had generally odious strategical pursuits for Iraq rather than a personal vendetta.