"The eureka moment [in deciding to remove Saddam] was that realization by the President that were a WMD to fall into [terrorists’] hands, their willingness to use it would be unquestioned.
The meaning is obvious. Only an intellectual child would not be able to figure it out -- the fight against Islamist militancy has been co-opted by the neoconservative (perhaps we should call it neoimperialist?) agenda and a desire by some to settle the 'unfinished business' that is Iraq. An excuse.