Flat earthers too. That debate has been raging since 500 BC and we STILL DON'T HAVE AN ANSWER. At least not one to convince the very thickest skulls. Oh, and the liars.
The implication being that "free speech" seems to compel some to think every time a crackpot posts that the earth is flat, or that Bush did 9/11 or that the Holocaust didn't happen we need to open our doors to them, dust off a podium and listen to their "thoughts"....