University has the right to host speakers with controversial or hateful views. Antifascist tactics are justified when faced with street violence from white nationalists but this is not the case here.  The non-violent demostrations by the majority of the protesters is constitutionally protected, the black bloc tactics by the minority to stop the speaker are illegal and counter-productive.

Of course the president's threat to remove federal funding for the university is the most troubling aspect of this.  It is the action of an authoritarian regime, not the leader of a free democracy.