and then, you face the alt-right answering you: ((( Wikipedia ))) (which means: made by the Jews)
USA law about freedom of speech is way too much liberal: made by clever people for clever people. In Europe: we faced Nazism, and Fascism, and we know that in a democracy stupid people can be extremely dangerous.
When something has been proved being wrong: promoting it should be forbidden by law, and punished from penalties to jail. That’s how we deal in Europe with people pretending that the holocaust didn’t happened: we jail them.