So the US as a nation is evil.
BTW, you are wrong: cubans do vote, too.
Really? There have been free and fair elections in Cuba, where anyone can start up a political party, campaign for their positions without any fear whatsoever of government retaliation, and successfully get elected to office, even if they have anti-Communist views? Wow, I hadn't heard about this. You seem to be pretty confident about stating it, though, so perhaps you can go into some detail about these elections.
I'm also wondering why so many people were so desperate to leave Cuba in rickety rafts even though they could have just voted out the Castros instead in one of these elections you mention, but I'm sure you can explain that too.
Yes, on the North Vietnamese invaders who had a track record of murdering civilians well before the US was ever involved. And the Japanese who perpetrated the Rape of Nanking, etc.
But even so - the US has voted out these previous politicians whereas Cubans were and are not able to do that.