Freedom of Speech

I know! I was supposed to blog about a particular website... But last night, I went for my second time to The Museum of Tolerance in L.A. And overthere, I saw about Nazi Propaganda. I saw posters, Newspapers, speeches from Hitler.... Propaganda can be irrational and not necessarily calling for emotions, and still works. The Nazi were accusing the Jews of being at the same time Communists and Capitalists, richs and poors, smart and stupid ect. When people are depressed, looking for impossible solutions, they're ready to listen, believe to anything they would be told. Which brings us to the question of freedom of speech. If we know that during those crucials situations, freedom of speech could be employed to propagate some messages of hatred, should we limit the First Amenment? Alexis de Tocqueville wrote that one of the particularity of America was a total freedom of speech. There is no other country in the world like America when it comes to freedom of speech. Should we responsabilze the people and teach them how to use this right? Or the fact to do so would be unconstitutional because it would be considerate like conditionning and thus limiting this right?