Whatever the beliefs of neo-Nazis and members of the alt-right, allow them to be heard. This is the liberty that underpins democracy. Let people hear what they have to say, it’ll be enough to bring about their own undoing providing their cause bares no legitimacy.
In some ways, after yesterday’s events, Milo Yiannopoulos has become even more well known to the viewers of mainstream media. There are many people in the UK outside of University campuses who have no idea about who he is, but from yesterday in particular that changed.