It has been a tactic of the Alt Right to request permits for the "celebration of free speech" and even name fake speakers who do not show up. Not calling themselves white nationalists, they use names like "American Freedom Party", "Traditionslist Workers Party", "Creativity Alliance", "Council of Conservative Citizens", and "National Alliance". Their websites solicit those looking to fight-- it started with "defending free speech" at Trump campaign rallies. This has happened at other college campuses. Some of the leaders, like Heimbach, leader of the "Traditionalist Workers Party" have pled guilty to charges of violence and justified it by saying yes they are violent but they are doing it to protect the true people of the USA. If you have people like Stephen Spencer telling you non-whites contribute nothing to the country and only corrupt it and the US belongs only to whites, or the Nazis who recite HItler era chants against the Jews-- you are inciting riots not free speech.