Challenge accepted. The Road to Dallas clearly lays out the mob's involvement. It has 68 pages of just bibliographic citations as evidence supporting the argument. The fact that you think that evidence can be boiled down into a sentence or two reply on reddit shows you don't really understand how things like research and evidence work.
If you have no knowledge of ZR/RIFLE, JM/WAVE, Operation 40, or Operation Mongoose, how do those answering "no" justify their blind confidence against their obvious ignorance?
The best book detailing the mob's involvement is The Road to Dallas by David Kaiser. It is exhaustively researched. Once you read it you can either decide is if was a plausible conspiracy involving figures in the mob or a series of impossible coincidences.
Chief counsel for the House Select Committee on Assassinations, Robert Blakey, wrote: "It is difficult to dispute the underworld pedigree of Jack Ruby, though the Warren Commission did it in 1964."
The House Select Committee on Assassinations, in their investigation of Ruby said that he "had a significant number of associations and direct and indirect contacts with underworld figures" and "the Dallas criminal element," but that he was not a "member" (made man) of organized crime, but rather an associate as he was Jewish and could not be inducted into OC.
On the night before Kennedy was assassinated, Ruby had dinner Joe Campisi, underboss of the Dallas crime family, at Campisi's restaurant, the Egyptian Lounge. After Ruby was jailed for killing Lee Oswald, Joe Campisi "regularly visited" Ruby.
James E. Beaird, who claimed to be a poker-playing friend of Jack Ruby, told both The Dallas Morning News and the FBI that Ruby smuggled guns and ammunition from Galveston Bay, Texas to Fidel Castro's guerrillas in Cuba in the late 1950s.
Blaney Mack Johnson, an FBI informant, said Ruby was "active in arranging illegal flights of weapons from Miami" to pro-Castro forces in Cuba in the early 1950s.
Ruby was a courier for gun trafficking and gambling in Cuba, having met with both Lewis McWillie and Santo Trafficante
Bob Vanderslice, an FBI informant stated that on the morning of the assassination, Ruby contacted him and asked if he would 'like to watch the fireworks,'" according to an FBI record dated April 6, 1977. So Jack seemed to know something.
There's much, much more than I can write here. One of the best books that academically lays out the mob connections is The Road to Dallas by David Kaiser. I don't agree with his final assessment, but it is a trove of information.
Here are some shorter sources on the matter:
Gunrunner Ruby and the CIA by Lisa Pease From the July-August, 1995 issue (Vol. 2 No. 5) of Probe
Possible Associations Between Jack Ruby and Organized Crime - HSCA Report, Volume IX, p.125.
Of the 50 or so books I have read on the assassination, Mortal Error is one of the worst. I do not think Oswald fatally shot Kennedy and find the theory of Secret Service shooting JFK accidentally a preposterous notion that ignores the mountains of evidence of a conspiracy involving elements of the CIA, anti-Castro Cubans, and organized crime that had been united in Operation 40. It drags Agent George Warren Hickey's name in the mud and accuses him of involuntary man slaughter. He was right to file lawsuits against the author and publisher.
While we disagree on some of the details I am glad we are both united in wanting more of the classified information released.
The best examination of phone records pertaining to Jack Ruby and other organized crime figures can be found in <em>The Road to Dallas</em>.
As for books in general, I'd recommend starting with Peter Dale Scott's <em>Deep Politics and the Death of JFK</em>. Daniel Ellsberg, who released The Pentagon Papers in 1971, stated Scott's work "makes most academic and journalistic explanations of our past and current interventions read like government propaganda written for children."
<em>JFK and the Unspeakable</em> by James Douglas is also a good introduction.
If you have any more specific questions about the mountains of books on the subject, please let me know as I have read a good portion of them over the years.
At this point, I'm more interested in why people believe what they do about the assassination. Would you mind sharing why you lean no conspiracy and what lead you to that inclination?