I've read quite a bit on the Kennedy administration, including the assassination.
In short, I do not post with answers; I post with the statement that it's far, far more complex than anyone who hasn't looked into it can understand IMO.
My view normally breaks an issue into this down by saying there can only be one truth, and there may be one single fact that settles all the other question one way or the other. Or, there may not be such a fact, just a lot of gray areas - 'is that a coincidence?'
If there's a fact and the odds are 1000 to 1 against it being a coincidence, that's a hell of lot of people going to jail in a nation of 300 million for the 1 in 1000 times it is.
The JFK assassination is filled with motives, and complicated organizations who are designed not only to not get caught but to plant false suggestions. It's filled with mysteries and more mysteries that it's next to impossible to conclude much about, where your normal opinion of what 'evidence' is is shattered as you see all kinds of evidence one direction or another, that's mutually exclusive.
Some of the most plauible theories are the least provable, and some of the most solid evidence is patently false.
If someone wants to appreciate this, one suggestion is to watch just one amateur investigator's video - David Lifton's "Best Evidence". How do you see the people who prepared the President for autopsy and flight at one end of the flight and witnesses at the other end testify that the materials were completely different at each end, 'proving' that there was a secret removal, sugical alteratoins, conspiracy, before the official military autopsy (by a relative amateur) at Bethesda?
You watch the eyewitnesses speak, and they seem quite credible, but you can't easily agree with the story that results. What's going on? Get used to it.
I can probably resolve a hundred common topics of the assassination here with fact or opinion, without offering answers on the conspiracy question.
One tip - forget the multiple shooter issue, and ask who was influencing Oswald.
There are real mysteries on his story - a strong suggestion he was working for the US government in his defection to the USSR, with some 'off the reservation'behavior like slashing his wrists in Moscow when the Soveits denied him a visa for those suspicions. Not just every young 20's kid who has defected to the USSR and return and is doing menial work finds himself with a best friend who is an older man with CIA ties, cleared to work on secret government photography.
There are many questions, such as the contradictions with Oswald - his creating a false image as a 'communist leader' for one, with his one man 'committee' creating publicity about him as a communist while his operation was based with a mysterious former FBI agent who was involved with far-right anti-communism. From his childhood, he had a fascination with the idea of being an agent - he was influenced by a tv show about a man who was loyal to the US but pretended to be something he wasn't to spy.
Oswald had no one who would know his views, really - a wife who he beat and was estranged from, a pretty crazy mother. When he'd chat, he praised Kennedy.
RFK's assasination has its own mysteries. It was a time of 'mind control' research and the assassin has long said he has no memory of the event.
There's a lot very strange about it, including some connections with shadowy figures he made before the killing, but there's nothing proving it wasn't the straightforward assassiination by someone indufirated by Kennedy's support for military aid to Israel. It is tragic that Secret Service protection wasn't provided to candidates until after he was killed.
It has its own mysteries - the coroner concluded that the killing shot was point blank behind Kennedy's head, at a point it appears Sirhan never got to, with questions whether Kennedy, falling from the first shot or shots, might have somehow fallen closer to the gun for a moment than anyone thought he did.
JFK's assassination exposes huge issues that would otherwise possibly be unknown, including the whole Cuba assassination infrastructure.
Indeed, there's evidence there was a coverup of much information - but to avoid exposing the Cuban activities, not the assassins.
It was a time when leaders and security officers could easily believe things should be covered up for 'national security'.
I'll mention just two interesting tidbits that did show some useful info, other mysteries, about Nixon.
The first is that Nixon, who was defeated by JFK, was obsessed with the family (he had Ted Kennedy surveilled), and he had phony documents implicating JFK for things he hadn't done wrong in foreign policy he claimed were found in the White House safe, and tried to release them to the press to smear JFK. The press figured it out. It should be a better known scandal than it is, but his other wrongs were better known after those.
The second is a real mystery. When Nixon wanted to pressure the CIA to stop the FBI from investigating Watergate by saying it was a national security operation, for leverage to force them to do what he wanted, he instructed his representative to the CIA to tell them, if they refused to lie for him, just to tell them to remember "the Bay of Pigs", and they'd get the message - the representative had no idea what that meant.
But Nixon's chief of staff, in his diary, wrote that Nixon used code words, and "Bay of Pigs" was his code word for the JFK assassination.
So here you have a President, his presidency as stake, trying to pressure the CIA to lie, and the best pressure he has is to say to remind them of the JFK assassination.
As if Nixon has something he can blackmail them about if they don't do what he says.
That suggests some real mysteries.