Fidel Castro knew that John and Robert Kennedy wanted him gone and had been plotting to poison him--if not kill him, at least cause his beard to fall out. (A Sidney Gottlieb cocktail.) But Castro also knew that if he tried to turn it around, the United States would enjoin Cuba with Atlantis, deep beneath the sea.
The JFK hit was most likely a home-cooked meal.
I'm not going to bore you with bullet trajectories and the large number of witnesses who died mysterious deaths. All of that is well documented by too many books--and a report issued in 1979 to conclude a congressional investigation that remained inconclusive.
Kennedy's assassination was conceived by two mafia godfathers: Santo Trafficante of Miami and Carlos Marcello of New Orleans.
It was likely coordinated by top mobsters Johnny Roselli and Sam Giancana. (Both were murdered after receiving subpoenas to testify before a Congressional committee. Roselli was sawn into pieces and stuffed into an oil canister, then dumped into the Atlantic Ocean; Giancana was shot at close range as he prepared a late-night sausage and pepper sandwich in the basement kitchen of his home.)
The actual trigger-men (two) would have been Cuban; both part of the earlier mafia contract on Castro's head. (The mob used some of CIA's anti-Castro funding to pay them off.) Anti-Castro Cubans, concentrated in the Miami area, hated JFK almost as much as they detested Castro after Kennedy left Cuban troops stranded at the Bay of Pigs in 1961.
Old fashioned revenge mixed with self-preservation.
Understand, the mafia helped elect Joe the Bootlegger‘s Boy to the White House. They stole Chicago for Kennedy, arranging for a number of long-dead people to vote, edging out Richard Nixon, the genuine winner.
What was their reward?
A ferocious Robert Kennedy as attorney general who, inexplicably, embarked on a determined crusade to jail or deport top mafia figures.
Perhaps RFK was out to prove his manhood (as the runt of his competitive family), along with trying to erase family connections to the mob. An anti-mafia campaign became RFK's obsession, to the chagrin of FBI director J. Edgar Hoover, who, for his own reasons, refused to even acknowledge the existence of a cosa nostra.
The mob bosses were outraged. How dare these Kennedys bite the hand that fed them so generously?
RFK went too far when he orchestrated the deportation of Carlos Marcello to Sicily, his homeland.
Humiliated and outraged, Marcello snuck back into the US and began plotting.
At a mob pow-wow, Santo Trafficante proposed that they put a contract on Robert Kennedy.
Marcello would have none of it--only the top enchilada would suffice. "If you cut off a dog's tail, the dog will only keep biting," Marcello told Trafficante. "But if you cut off its head, the dog will die."
When the deed was done, RFK knew very well what had happened, and this compounded his inconsolable grief. RFK blamed himself, for it was he who personally spearheaded CIA's attempts to get Castro, cementing an otherwise tenuous agency relationship with the mafia.
Under President Lyndon Johnson, Robert Kennedy became a lame attorney general. His spirit for the job was all but snuffed out. And he had his children's security to think about.
Johnson, who had referred to JFK in the late 1950s as "that spavined hunchback," had grown weary of the Irish mafia's sobriquet for him, "Uncle Cornpone."
J. Edgar Hoover shed no tears either. He loathed the Kennedy brothers; Robert, especially. He was relieved to have them off his back.
Significantly, the venerable FBI director maintained good relations with mob bosses. He even traded horseracing tips with top New York mobster Frank Costello. The essence of the Hoover-mafia relationship was this: Mobsters had much earlier obtained photographic evidence of Hoover's homosexuality; specifically, J. Edgar's relationship with FBI deputy director and longtime companion Clyde Tolson.
So the FBI investigation evaded every lead that pointed to the mafia.
Lee Harvey Oswald?
A fiery young idealist who drifted from one cause to the next, ultimately allowing himself to be strung into the wrong place at the wrong time by the wrong crowd under the wrong set of circumstances.
Jack Ruby, a Dallas nightclub owner and mob associate from way back, was chosen to hit Oswald. The deal to break him out of prison and set him up a millionaire in Mexico went unfulfilled.
A few years later, Ruby was dead from cancer; the Warren Commission whitewashed the event for reasons of national security -- and the mafia became alarmed by Robert Kennedy's rise to popularity. They knew if he got to be president, their long-running situation comedy would be cancelled. RFK's fate was sealed.