I am not suggesting, the "Men in Black" are putting people, who ask the wrong questions in gulags. Things happen more subtile today. A scientist, for example, might not get invited to speeches anymore, or his University might stop supporting his work, because it "might damage the reputation" (read: "endanger US-American relations"), as happened to Dr. Ganser in Zurich.
I don't consider this a "wild claim", and you don't need to be a conspiracy theorist to see, that governments strongly influence the media and historians (so, people who interpret what happens) to justify wars to the public under false asumptions (google "Nayira Testimony", or maybe
stuff like this). In a sense, this is "hate speech" done by the government, as was Mein Kampf (well, unless you really read it, and realized how stupid it was).
I fear this is all becoming too off-topic (unless we want to discuss, whether or not this falls under "freedom of speech"). So I will leave it at that.