Again, there is a gigantic gulf between regime change in countries largely outside of American public consciousness and assassinating the US President.
Cuba is outside of American public consciousness? Could you expand on why you believe there is a massive difference between the two? If an organization takes no issue with overthrowing democratic governments (like Guatemala), what makes their own government unique?
We pay the CIA to forward American interests. Most of their actions, even the most nefarious ones I'm aware of, have a somewhat believable rationale as to how they fit into that overall priority - often extremely imperfectly in both ends and in means. So if someone could put forth a theory for how assassinating JFK would benefit CIA or the US then sure. But largely the CIA implication is just "big shadowy CIA is responsible for all the unexplainables."
> So if someone could put forth a theory for how assassinating JFK would benefit CIA or the US then sure
There are plenty of theories where the CIA benefit from his assassination.
> Shortly before Hunt's death in 2007, he authored an autobiography which implicated Lyndon B. Johnson in the assassination, suggesting that Johnson had orchestrated the killing with the help of CIA agents who had been angered by Kennedy's actions as president. [0]
Some think he was removed due to his immanent withdrawal from Vietnam. [1]
Nonetheless, if you are the head of an organization that deposes governments by assassination, is it really _that_ far fetched to think you are above the law and would use the tools and your disposal and experience to dispatch anyone in your way?
Yes because in one case your actions are in service of your country and in the other you will be declared a traitor and executed as such.
Edit: Did you read the "JFK decided to withdraw" link? He allegedly decided to withdraw 1000 of 17,000 Americans in Vietnam. This one step forward two steps back military strategy is par for the course for the duration of the Vietnam War. Doesn't substantiate at all why CIA would be so upset about it as to assassinate POTUS. Per your own link, it was a minor enough move that they didn't feel the need even to consult or notify South Vietnamese President Diem.