But.... The basic history that Chomsky discusses in his books are accurate. I respect his political work, from the perspective of journalism.
He has been a tireless collector of government abuse of power throughout his career and has collected more documentation than most historians on every aspect of US Foreign policy since WWII. He was first published, predicting the rise of fascism in Europe - during the 1930's (when he was 12 yrs old).
The historical facts he tends to harp on may make him seem like some a conspiracy theorist (to someone who isn't aware of US Foreign Policy); but I assure you he is not - and rarely makes errors of fact.
What things do you think he gets wrong, specifically?