The mafia had no real interest in JFK. Maybe his brother Robert, but not the President.
Oswald was a lone actor, just as he acted alone in an attempted murder of a General Walker.
Ruby knew mobsters, but he was not trusted by them.
Motive: The CIA tried several times to kill Fidel Castro. Operation Mongoose considered poisoned cigars, poisoned diving suits, mafia rub out.
Did Castro kill JFK?
Castro did not have the means to do so.
Castro wanted the US to leave Cuba alone. An assassination would have led to an invasion. (Castro said this.)
Oswald was refused entry into Cuba.
Motive: The USA was a serious rival in the Cold War. Killing JFK would provide instability in the military and government.
Russians killed JFK?
Why would the Russians risk nuclear war? Having LBJ as President would not have benefited
People (including me) believe what they want to believe.
Some want to believe JFK was not killed by some lone nut.
Some enjoy being in the minority opinion.
Letís let celebrities die in peace!