I personally find Holocaust denial deeply offensive, and I absolutely didn't intend to defend the intent of people who deny that. Our goal with fake news is not to prevent anyone from saying something untrue - but to stop fake news and misinformation spreading across our services. If something is spreading and is rated false by fact checkers, it would lose the vast majority of its distribution in News Feed. And of course if a post crossed line into advocating for violence or hate against a particular group, it would be removed. These issues are very challenging but I believe that often the best way to fight offensive bad speech is with good speech.