There was so much criticism of Chomsky, that WikiPedia had to create a special article about it: LINK Criticism of Noam Chomsky
Noam Chomsky - A Negative Subjectivist...
Below is just one example of hundreds, mentioned in the entire article...
Criticisms of Chomsky as a Political Theorist
[edit] Alleged Unfair Paraphrasing of President Truman
In a long letter to the December 1969 issue of Commentary, Arthur M. Schlesinger, Jr. accused Chomsky of inventing quotations from a speech by President Harry S Truman:
In American Power and the New Mandarins Dr. Chomsky twice (pp. 268, 319) printed a series of what he represented as direct quotations from what he called this "famous and important" speech: "All freedom is dependent on freedom of enterprise.... The whole world should adopt the American system.... The American system can survive in America only if it becomes a world system." The purpose of these Truman "quotations" was to prove that the United States had long been "using its awesome resources of violence and devastation to impose its passionately held ideology and its approved form of social organization on large areas of the world" (p. 31

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Schlesinger quoted Truman's actual words:
There is one thing that Americans value even more than peace. It is freedom. Freedom of worship - freedom of speech - freedom of enterprise. It must be true that the first two of these freedoms are related to the third. For, throughout history, freedom of worship and freedom of speech have been most frequently enjoyed in those societies that have accorded a considerable measure of freedom to individual enterprise. Freedom has flourished where power has been dispersed. It has languished where power has been too highly centralized. So our devotion to freedom of enterprise, in the United States, has deeper roots than a desire to protect the profits of ownership.
Schlesinger wrote of Chomsky: "He begins as a preacher to the world and ends as an intellectual crook."
In his reply to Schlesinger's criticism, published in the February 1970 issue of Commentary, Chomsky admitted that some of the quotations he had attributed to Truman were in fact paraphrases of Truman's speech from secondary sources. He stated that this was an innocent mistake and promised to correct the quotations in future printings of his book. He argued that:
The remarks at issue are not theorems deduced from Truman's text; rather, they are efforts to formulate concisely the essence of his remarks. By any reasonable standards, their accuracy seems to me undeniable.
The exchange continued in the March, May and June 1970 issues of Commentary, with Schlesinger having the last word.
Interviewed in the book Chronicles of Dissent, Chomsky commented:
<BLOCKQUOTE>
In the first book that I wrote, American Power and the New Mandarins, in the first edition there’s a slight error, namely that I attributed a quote to Truman which was in fact a very close paraphrase, almost verbatim paraphrase of what he said in a secondary source. I got a note mixed up and instead of citing the secondary sou