An assassination of an American President is never a good thing.
In 1963, some viewed it as the solution to US policies.
1. Castro SS G2
2. Pro-Castro Cuban Americans
3. Anti-Castro Cuban Americans
4. A cadre within the CIA
5. Anti United Nations US operatives
6. The Mafia
7. Random haters
8. Random nuts
If it was planned it was LBJ.
It was one guy. Forget the conspiracy theories. They are all bunk.
In any event, it was FIFTY years ago. Life is too short to waste on JFK nonsense.