Obama isn’t APPEASING the Castros. “Appeasement” is what you do to an enemy, when you aren’t prepared to fight him, whether militarily or morally.
Obama is the Castros’ ally, their collaborator, their buddy.
He is their vanguard fraternal Communist comrade, their Tovarische, their admirer and would-be emulator. Barky would love to drive around in a jeep with a machine-gun on a mount, followed by a "technical" or an armored fighting vehicle, lording it over Americans and telling us to our faces how much he hates us, before he lines us up and shoots us.