> I reject the notion that Apartheid South Africa
That's a blatant false dilemma.
The atrocities committed by Fidel Castro aren't whitewashed just because you can pick other nasty regimes.
Stalin isn't suddenly fabulous because he fought the Nazis.
Fidel Castro imposed a totalitarian regime on Cuba and extensively used violence and political assassinations to preserve his stranglehold on Cuba. Fidel Castro also projected his atrocities by intervening in decades-long civil wars.
You can't pretend nothing happened by playing the racist card.