The Summer of 63 plot about the Atmospheric Test Ban with JFK and Russia began the USAEC / Oak Ridge plan to replace JFK with LBJ, and JFK was called a Communist.
Except for the brain dead in society with severe Dunning-Kruger issues of not following the CIA's disasters, the JFK and LHO hits are easy to solve.
JFK inherited a project called Operation Mongoose to kill off Castro using the CIA cut out operations with the Giancana Mafia and its underworld alliances.
The CIA tried all kinds of deals, more than 30 and all crashed and burned. The most diabolical one was to use the Green