Also see Mark Zuckerberg clarifies: ‘I personally find Holocaust denial deeply offensive, and I absolutely didn’t intend to defend the intent of people who deny that.’ (Recode)
"Zuckerberg said if people flag posts as potential hoaxes, Facebook will send the content to fact-checkers who can verify the claims. If the posts are false, Facebook will “significantly reduce the distribution of that content” in the News Feed, he said.Why Mark Zuckerberg says Facebook won’t ban Infowars and Holocaust deniers -- The Washington Post
“Reducing the distribution of misinformation — rather than removing it outright — strikes the right balance between free expression and a safe and authentic community,” Facebook said in a statement Wednesday. The company said that in coming months it will change its policies to allow the social network to remove certain types of misinformation that contribute to physical harm."