And another thing, you ARE aware that the whole “CIA being responsible for JFK’s assassination” was actually Soviet disinformation, right? Yeah, that was actually made as a result of a KGB disinformation campaign called Operation Dragon, which went into effect literally a DAY after JFK’s assassination. Ion Mihai Pacepa actually goes into full detail about that whole operation, which his boss had some involvement in, as did him to a certain degree. Just read up on his book “Disinformation”. He goes into full detail about that bit, and various other KGB disinformation campaigns (and he’d know, he also played a role in Operation Ares [which was the disinformation campaign relating to the anti-war movement regarding the Vietnam War] and Operation Che [you don’t need two guesses as to what, or rather, who that referred to].).
Besides, why would the CIA want JFK dead for withdrawing from Vietnam when both he and McCone (the boss of the CIA at the time) never approved of Diem’s assassination in the first place (well, approved as in signed off on it with full knowledge and a definite order, as Kennedy specifically stated he intended to make sure McNamara and Rusk were notified BEFORE the op was cleared, and even kicked himself over having approved it on a Saturday.).
Not to mention, if assassination was how they would get rid of presidents they didn’t favor, they would have gotten rid of Trump via that method rather than just try to do a [poorly planned] smear campaign against him. So no, they obviously weren’t responsible for JFK’s assassination even if they DID hate him (and they’d have more reason for hating JFK regarding Bay of Pigs than Diem’s assassination because that time, JFK DID in fact order to cancel air support due to chickening out). If anything, they’d just leak dirty stuff about him to the press, including the fact that he slept with an East German Spy within the White House, and get him impeached.
In fact, if anyone was responsible for his assassination, it was the Soviets, or at least the Cubans (Markus Wolfe, Oscar Marino, Ion Mihai Pacepa, and others from within the Soviet Bloc gave pretty dang convincing arguments for how those two parties were responsible, and is even backed up by the Mitrokhin Archive that had been smuggled to Britain.).