Not many people know that Fidel Castro was an actor in Hollywood before his rise as a revolutionary. It's also fairly likely that he worked for the CIA and therefore at some point walked away from them. This would explain the Bay of Pigs which was pointless as the US had a US Military camp at Guantanamo and still have to this day.
It also seems reasonable to suggest that the reason for the CIA's hatred of Castro (and thus the United States' establishment) is because he turned on them. Fidel Castro was one of a handful of leaders who informed us that the US and Israel fathered ISIS (along with their MI6 mates and Saudi/Qatar money).