I posted in another thread but this is why JFK was killed.
https://isgp-studies.com/john-f-kennedy-assassination-of-1963#jfk-foreign-policy-assassination-reasons
14 Foreign Policy Reasons
1. Too soft on Cuba - did not support Bay of Pigs, rejected Operation Northwoods,
2. Supported left wing government in Indonesia, gave billions in aid - was later overthrown in 1965 in CIA backed coup
3. Supported a failed coup in 1961 against right wing Portugese dictator Salazaar
4. Supported 1961 peace accords that ended French/Algerian war. French President Charles DeGaulle also had attempts on his life for doing the same.
5. Forced S. Korean military dictatorship backed by right wing Moonie cult to bring back civilian rule
6. Vietnam policy - He supported the assasination of right wing Catholic dictator of south Vietnam Diem. Diem was backed by the CIA. He was also de escalating US involvement in Vietnam and would have eventually pulled out
7. Was too close to Socialist party in Italy
8. Was too close to Patrice Lumumba in the Congo and opposed Belgian and CIA backed partition and takeover of the mineral rich country.
9. Supported left wing leader Kwame Nkrumah of Ghana, who was later overthrown by CIA in 1966
10. Too Close to Egypt's leader Gamal Abdul Nasser, who was being attacked by European fascists, CIA and Mossad
11. Supported independence of Guinea contrary to CIA
12. Supported anti-French leader in Algeria Ben Bella
13. Policy of detante with the Soviet Union and trying to limit nuclear testing.
14. Opposed Israel attaining nuclear weapons and pushed for inspections
7 Domestic Reasons
1. Friction between JFK and FBI director J Edgar Hoover. Hoover was staunchly anti-communist, also JFK forced Hoover to admit that La Cosa Nostra organized crime existed.
2. LBJ hated JFK, apparently LBJ was only chosen as VP because Hoover was blackmailing JFK
3. Was going to get rid of a tax cut for oil industry (Oil Depletion allowance)
4. Mafia hated RFK and JFK , Mafia arrests increased 700% under Kennedys.
5. anti-Castro Cubans hated JFK
6. American Security Council (precursor to CNP) hated JFK, thought he was too progressive (supported MLK, soft on socialism)
7. Many corporations hated JFK, he was breaking up steel monopolies