Che was even more open in his hatred of blacks than Fidel and Raul, who killed and imprisoned mostly blacks. Che wrote in his infamous motorcycle diaries:
“The blacks, those magnificent examples of the African race who have maintained their racial purity thanks to their lack of an affinity with bathing, have seen their territory invaded by a new kind of slave: the Portuguese.” “The black is indolent and a dreamer; spending his meager wage on frivolity or drink; the European has a tradition of work and saving, which has pursued him as far as this corner of America and drives him to advance himself, even independently of his own individual aspirations.” Robert Redford had to know about Che before he made his propaganda movie for Hollywood.
Part of the reason that the super rich and privileged Castros attacked the dictator Batista was because he was half-black. Castro called Batista racist names to vile to post on the Baptist Board.
So, yeah, the Black Caucus got fooled but they probably knew it all along and wanted to be fooled.