From an old Art Bell show with old DC insider Jack Anderson hawking his book on the JFK "hit"...
...the Mob was pretty ticked off at AG RFK for going after them, and JFK for not taking out Castro when he had the chance, and Castro was pretty ticked off as well, so...
...Castro hired the Mob with the false promise of returning their casinos seized by the Castro regime.
Again, remember it was an aging Jack Anderson writing what probably was his finally hurrah. I think he died about a year later.
YMMV.
Well, peripheral circumstances being what they may, there is no evidence of the mob complicit in JFK’s assassination.
Jack Ruby was the most loyal, ass-kissing, mob wannabe that ever existed. He was willing to do anything to gain favor in the eyes of his bosses. There is one (1) and only one reason Ruby kills Oswald - because a mob higher up told him to.
There was some horse manure nonsense put out about him being so concerned about Jacki Kennedy. What utter crap. This is a guy who did nothing his whole life but exploit women. When one of his strippers turned up pregnant, he took her for an abortion, then made her work that night, and deducted the cost of the abortion from her pay. Yea, he had great concern about women's feelings.
The only way he kills Oswald is if he is told to by his higher ups. And the only way his higher ups waste a perfectly obedient ass-kisser like Ruby is if there is something Oswald could tell the police that they REALLY don't want out.