Actually he has a point, he was on the receiving end of a coup in Aoril 2002, if not organized by the US then with it's tacit support. It was overturned by people power and the loyalty of his palace guard who arrested the conspirators and restored him to the Presidency. But of course it was a little more complicated than that. No left wing leader in South America can feel entirely safe particularly one with huge oil reserves. Everyone remembers what happened in Chile on 9/11/1974.
It was the subject of a fascinating documentary by a couple of Irish filmakers who happened to be on the spot during the entire event. It's well worth seeing if only for the drama of the moment it captures.
http://www.chavezthefilm.com/index_ex.htm The website is worth reading properly because although it has a definite left wing slant (to say the least). It decries what it calls 'neo liberalism' . Those liberals get it in the neck from all sides. LOL The website does has a particular point of view which is not so evident in the film. Anti globalization etc etc. Not really my cup of tea. But some undeniable facts.
I do think that Chavez fancies himself as some kind of Castro and his opponents have a point. I also think he is playing to the gallery in this case although I'm quite sure the US govenment wants him to go away. Left wing governments in South America do have a habit of 'going away'. But to suggest America is sponsoring terrorists in this day and age is a bit much to believe.