For the record, Voltaire did NOT say those words. They came from a 1907 biography of Voltaire.

“I don’t agree with what you say but I will defend to the death your right to say it.”

Unfortunately, the quote isn’t real — or at least, it’s not really Voltaire. It comes from a 1906 biography by Evelyn Beatrice Hall, in which it was intended to represent a summary of his thinking on free speech issues. “I did not mean to imply,” she wrote later, “that Voltaire used these words verbatim.”

http://studentactivism.net/2015/01/08/no-voltaire-didnt-say-that-no-not-that-either/