I highly recommend Michael Totten’s excellent—and very sad—article on Cuba. Pay special attention to the story that Alfred Cuzán (whose family fled when he was a child) tells about the early years of Castro’s regime and how the leader initially fooled people and then clamped down.
Also of great interest is the tale of Garland Grant, a Black Panther from the US who believed the leftist hype about Cuba, hijacked a flight there in 1971, and got the surprise of his life on arrival. He ended up saying things like “Believe me, I’m all for the United States now. I’d even wear a Nixon button.” And that was after Watergate.
Actually, the whole thing is of great interest. Just read it.