Sure. Although, when one starts advocating violence, it becomes problematic.
Richard Spencer says things like: "‘Does human civilization actually need the Black race?’ ‘Is Black genocide right?’ and, if it is, ‘What would be the best and easiest way to dispose of them?". This is despicable but protected in the form of an essay. But what happens if he says similar things in front of a mob carrying torches? That's when things get iffy.