It just became public knowledge that the US Govt flew 320,000 illegal aliens into 43 different airports over the course of the last yr. This clandestine "stuff" is Not new. With regard to, "...the idea of a CIA/government conspiracy, one promoted by Oliver Stone among others, in the assassination is absurd", displays memory loss or ignorance of "Operation Mongoose".
Operation Mongoose was run out of the Kennedy White House. It was pushed by the Kennedys, especially RFK, after the failed Bay of Pigs invasion. This was no "Deep State" rogue operation; it was undertaken on orders of the President. There are entire books written on it; it's been exposed for decades. In any case, I don't know what this has to do with this supposed coverup of the assassination of JFK but it's your call (covert acts ordered by a President against a hostile foreign government during a "Cold War" is not in any way similar to the treasonous murder of your *own* president and then a half century coverup).
Once again: the assassination is the most investigated event/crime in US history. Multiple generations of Americans in government and in the media investigated it directly and indirectly. And multiple generations of Americans have served in the various agencies over the past 60 years such as the CIA, the FBI and the Pentagon. The idea that you could keep the conspiracy quiet after all of this, all of these investigations, all of these men and women going into and out of the government is preposterous.
Finally, I have no idea how pointing to other government conspiracies that we know about is evidence that there was a conspiracy in the assassination that has been covered up. How does pointing out *other* exposed/revealed conspiracies, like Operation Mongoose, show that the JFK conspiracy has been hidden? In fact, it shows the opposite. All of these other revelations show how impossible it would be to suppress a conspiracy in the assassination of JFK. People talk, investigations uncover it, documents are found. That's what happens.