I've been thinking of starting a thread on this to give my thoughts - thankfully one already exists!
Here goes:
JFK was killed by the CIA working directly with the Mossad (including through Jewish mobsters connected to Meyer Lansky, who was a major zionist in addition to being a wildly successful career criminal with interests in Cuba), in a successful internal coup which had several goals:
1. Remove the U.S. official (but not-really-enforced) arms embargo on "Israel."
2. Stop the repeated efforts of the executive branch (under both Kennedy and his successor Eisenhower) to get the American Zionist Committee for Public Affairs (the predecessor to AIPAC) to register as a foreign agent under FARA.
3. End U.S. demands (by Kennedy, in 1963, shortly before he was assassinated) for "Israel's" nuclear weapons stockpile (partly stolen from the U.S.) at Dimona to be inspected by the IAEA. This demand from JFK greatly angered the "Israelis" and led to "Israeli" PM David Ben-Gurion's resignation under pressure from Kennedy to allow inspections.
4. Retaliate against Kennedy for (rightly) getting pissed off at the CIA for its disastrous Bay of Pigs operation, curb what the CIA saw (rightly or wrongly) as Kennedy's increased hostility towards U.S. imperialism, and ensure that the U.S. continued its deranged (and failed) mafioso crusade against Cuba for decades to come.
5. Derail what was seen by the CIA & Mossad as excessive friendliness towards the USSR.
6. Prevent any potential reverse (real or imagined) on U.S. imperial war in Vietnam.
James Jesus Angleton, head of the CIA at the time of the assassination (when the CIA was not forbidden from
openly doing ops in the continental U.S.), had established the "Israel" desk at the CIA, and was responsible for greatly increasing U.S. espionage ties with the Mossad. He had major ties to "Israel," which hated Kennedy, and also he hated Kennedy himself due to Kennedy's criticism of the CIA. He had been surveilling Lee Harvey Oswald since 1959 (unless I'm misremembering and it was 1958), keeping close tabs on him for at
least four years right up to Kennedy's killing. On the morning of the day of the killing, future CIA director (and future president) George H. W. Bush had been in Dallas, Texas - though he would always claim, when asked in future interviews, not to have remembered where he was on that day.
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