"Truthers" don't seem to have any problem imagining that the perps were insane enough to concoct such a ridiculously complicated and unnecessarily risky plot, but how would you like to have been assigned the job of going around getting all those other folks to cooperate? "Hey, the Prez needs your help to kill a few thousand people so he can invade Iraq." How fortunate for them that those hundreds or thousands of accomplices apparently didn't include a single person possessed with a shred of human decency -- and not even a single Democrat still PO'ed about the results of the 2000 election -- who could have not only put an end to the scheme before it got off the ground, but sent all the perps to prison for a very long time.
One of the saddest things about the pathological psychology of conspiracism is the level of distrust required to believe this scenario; it must be horrible to live in a such a state of constant fear of virtually everyone else.