Unlikely based on what specifically?
Unlikely that all those people would act against the investigation of the JFK murder. Just as it is unlikely that a large group of people would decide to assassinate JFK and keep it a secret. No one would alert the authorities so as to save the President and become a great American hero.
We know that LBJ and RFK suspected that there was a conspiracy yet still endorsed the Warren Report. That should be proof enough that there were "other" motives for sticking with the Lone Assassin conclusion beyond involvement with the conspiracy.
Why do YOU think LBJ chose to go against his personal belief that there was a conspiracy in Kennedy's murder?
I've already given my opinion based on what Johnson told Earl Warren.
Now everyone in the chain of command would drop the investigation. Some would pursue it, if only in the hopes of making the biggest break in their career. People would have to be repeatedly told the drop it. But we don’t have reports of FBI agents or policemen being told to drop it time and time again.
As far as LBJ is concerned, yes, it is clear he feared, in the worst-case scenario, that the Warren Commission, would find that Castro arranged for Kennedy’s murder. In which case, the American public would likely demand an invasion of Cuba to bring Castro to justice. Which might trigger the Soviet Union to retaliate. Like invading West Germany. But, while having these fears, there is no evidence he made certain the Warren Commission made certain they really reined in their investigation. Many who took part said they tried hard to find a conspiracy. It would be the highlight of their career. But could not find a strong link. None say that LBJ or anyone else pressured them to not find anything.
I honestly don't know. It could all be coincidental that people like Johnny Roselli, Sam Giancana, David Morales, Bill Harvey, and George DeMorenschildt (all suspected of involvement with the assassination) died around the time when Congress began re-investigating the JFK assassination. Or maybe it wasn't coincidental.
OK. So, you are not a Small-Secret-Enduring CTers, who only believes there were two or two involved. You think there were five others. And, I bet, if I looked through your old posts, I would find a lot of other names.
And who ever heard of someone in the Mafia dying? And if someone well known in the Mafia does die, they shoot up to the top of the list of suspects in the JFK assassination. The one who is different is George DeMorenschildt. But, one of the most common forms of death in the elderly is suicide. Particularly if they are running out of money. And DeMorenschildt was under extra stress, about to testify to the HSCA where he would have to answer questions about joking with Oswald about him becoming an “assassin of Fascists”. Or why he suspected Oswald of trying to kill General Walker but just seemed to laugh it off.
And, it is strange, that if the HSCA had discovered a “bombshell”, why did they keep this a secret, even after DeMorenschildt died? Just what questions were they going to ask him that would require him to commit suicide or to be murdered? They have never said.
Not if it was an inside job.
If the truth is that individuals within the US national security community participated in the murder of a US President, that sort of thing could bring down our entire political system and cause all sorts of political disorder.
If you think Americans distrusting their government is bad now, imagine how much worse things would be if it were confirmed that Kennedy's assassination was an inside job.
Again, it’s beginning to sound like a larger conspiracy then the two or three you talked about. Just how large is the conspiracy that you suspect existed?
In conclusion, no, I don't believe the persons involved with killing JFK necessarily needed to have the same agenda and motivations as the institutions that covered up things after the assassination. It's plausible in my honest opinion to view the Conspiracy plot against JFK and the various institutional coverups as two entirely separate things...
A convenient way to pare down the size of the conspiracy. A smaller number of people who knew about the assassination beforehand. And a larger group who acted as if they were part of the conspiracy, but, by coincidence, were following their own motives that just happened to always work against a serious investigation. Whether they worked for the government or the media.