Chomsky takes the anti-American, or anti-government side of any and all debates and writes whiny essays full of sarcastic jabs that preach to a choir of the faithful. He makes no attempt to consider the side of government(or whoever he as casting as the villain at the moment of his self righteous spiel). It's as much of a tragedy to take him seriously as it is to take radical right think tank garbage seriously.
Without an example of specific instances where Chomsky does this, and reasons why he was wrong, this is pure ad hominem.
Please do familiarize yourself with his views on other issues.