By the way, most sugar mills were Cuban owned not American owned as most large enterprises.
Then we had a few freedom flights to Mexico and Spain, and fewer to Miami. Here the large middle class began to leave. Cuba was a multiracial society, and yes as a percentage, more white Cubans left. But what that means is that black Cubans suffered the worst from the revolution. In order to leave, you had to have your family in the US "claim" you so since more whites left early, more whites were claimed by their family. Black Cubans fought in the Bay of Pigs against Fidel and his gang and also were in the Escambray Mountains after the same rebels that fought for the revolution realized that what they fought for was not what they got.