What the US did in the cold war does matter, both the good and bad. And in South and Central America's case most of what the US did was bad and the US of today can not run from this history.
Sadly it seems some in the US wants to repeat that history and have learned nothing from the last 50+ years of supporting brutal dictators and not allowing people to live as they want.
Chavez is just a reaction to this history, just as the Mullahs in Tehran are a reaction to this history and so on and so on and you can keep denying this and ignoring these facts, but that wont make them be less of a fact and it wont make them go away.
Killing one person is murder, killing 100,000 is foreign policy