Very simple.  Needed a Dem to ignore/whitewash any investigations into Bush activities (like Iran-contra).  Clinton was compromised so they controlled him (via Mena and other activities).  It is why Clinton/Bush have a cozy relationship despite the supposed partisan divide. I think Bush's intentions were mostly benign - to foster peace and keep us from nuclear holocaust.  But once you let the camel in the tent...  Too much energy is spent keeping secrets out of the public.  I don't doubt he was involved with JFK - he would not have been the ringleader at the time but being CIA, he was part of the rogue group that carried it out and covered it up.  Terry Reed's book 'Compromised' covers a lot of this and also asserts that the attempt on Reagan's life was a coup attempt and Bush was involved.  The Hinkley's were Bush family friends - that much is factual.