The U.S. topples democratically elected governments, when it doesn't suit them and installs their fascist puppets whenever they please, as evident throughout the 20th century, or more recently in Honduras. The current opposition to Maduro in Venezuela is also lead by U.S. backed fascists of the worst kind. Those governments you mention in large part have no resemblance of democratic socialist administrations, but are lackies of corporate America. Look at Nicaragua right now. The spirit of the Nicaraguan revolution has long died away, Ortega established as autocrat solely protects the interest of international capital and doesn't shy away from slaughtering his own people. I'm not endorsing the Maduro govt. in Venezuela btw, but the U.S. needs to stop intervening where it doesn't belong and focus on the endless list of problems within its own borders.