Your narrative is broken. What actually happened was a bunch of ideologues came to power, saw an opportunity to remake the middle east in aid of a "new american century", then lied about wmds to convince the public there were WMDs.

The weapons inspectors were thrown out of Iraq because they were spying for the CIA. They were desperately invited back by Iraq to try and stop the war, to no avail, because WMDs were never the issue: war was.