Just to be clear: The people in charge are the CIA, not GWB. GWB was simply the right useful idiot at the right time in the right place.
I don’t know where you are getting your information from but it’s absolutely incorrect.
It was Cheney specifically who was relying on Chalabi whom the CIA had repeatedly dismissed as a fabricator which is what was used as evidence.
Just to be clear: The people in charge are the CIA, not GWB. GWB was simply the right useful idiot at the right time in the right place.