The Leftists media and academia writing history who were alive at the time and/or alive today will NEVER reach a conclusion that a commie conspiracy was responsible for the death of President Kennedy.....NEVER, NEVER, NEVER.
The Left will go to great lengths to prove theories that the Mafia or other entities conspired to do the deed. It will not involve Moscow or Castro in the mix.
It just so happened that unstable, attention-seeking Oswald, by chance a communist sympathizer, decided to assassinate JFK and go down in history as a hero to some and a scoundrel to others....but he WOULD get royally noticed in either case. He was a lone-wolf psycho just like the guy that popped John Lennon.
The Mafia generally and historically won't get involved in conspiracies to take out presidents, popes or policemen by assassination no matter the provocation because they never want to call attention and the spotlight to themselves in this manner. They mostly stick to killing each other.
The only reason Lee Harvey Oswald even had a job at the Texas School Book Depository from where he shot President Kennedy was because of a lady named Ruth Paine.
Ruth Paine is a nice Quaker lady who was looking after Marina Oswald and managed through a friend to get Lee Harvey Oswald a box-kicking warehouse job at the Texas School Book Depository during the short time the Oswalds were reconciling from a previous marital separation. The only reason Ruth Paine even knew Marina Oswald was because they were introduced by a mutual friend from a choral singing group who thought that Ruth would enjoy meeting a native Russian speaker, since Ruth Paine was a member of Quaker pen pal program between the USA and the USSR.
Ruth Paine is still alive and living in California, still doing her liberal-ass Quaker charities and stuff. She still gets interviews from time to time. For there to have been a conspiracy in the assassination of JFK, Ruth Paine would have had to have been a kingpin in either the Mafia, the CIA, the Cuban military, an anti-Castro soldier of fortune, a Pentagon deep covert agent, a Russian hit woman, or some part of any of the wild theories used by crackpots to explain their money-grubbing conspiracy.
Unfortunately for the conspiracists, the fact that Ruth Paine is/was none of those things and continues to be alive is shattering to their conspiracy theory's credibility -- so they typically just ignore all mention of her as if she never existed.
I agree with your assessment of the Mob's usual tactics. They are historically very attached to their own turf and extremely reluctant to move onto other territory, because it makes a war break out among their own.
It's hard to imagine the Mob would have had a large "standing army" in Dallas to begin with, to grease the skids for them and tell them which cops were dirty and otherwise know the ropes. In the planning stages, it's very unlikely that they would have trusted an outsider with taking the shot and keeping quiet about it if captured. If Oswald had received front money, seems it would have shown up in the investigation, and it's unlikely he would have done it without front money, since he was chronically underemployed and had a wife and kid. It's even less likely they could foresee a way to then silence an outsider if he was captured after accomplishing the shooting -- unless they had paid off the cops to expose Oswald to Jack Ruby the way it went down -- during transport. It's possible. But it would depend so much on luck and perfect timing.
That's not to say that they didn't develop various plots and fantasies to kill Kennedy. Just that somebody else got there first.
I read O'Reilly's book Killing Kennedy. It didn't offer much insight into who did it, but did make it clear just how very many factions wanted the arrogant bastard dead.
And by the way, don't waste your time reading it. O'Reilly just couldn't help himself from hero-worshipping -- still -- the Obama of his day -- a good-looking, slick narcissist with a fashion-conscious, big-spending wife, a lot of dirty money and special interest groups behind him, and an unattractive opponent in the elections. I thought O'Reilly would have grown past that by now. To give credit, he didn't shrink from laying out JFK's disgusting sex addiction in black and white, and Jackie's materialism. But his presentation of these serious character flaws was still all mixed up with his childhood emotions about them -- that they were almost "saints" in the Irish-Catholic community where he grew up.