For the record I don't recommend, condone or think about killing anyone. This is interesting to me, so thanks for posting.
This guy is prominent. Not an adjunct professor getting thrown under a bus. Probably a tenured professor, so we may see an actual free speech battle. We'll see who amongst is willing to disagree with but die for this guys views to be financed by the public.
Additional interesting point is - according to lifenews.com - "racist, homophobic, or transphobic speaker" is equivalent to "right-wing speaker". That is understandable as a discussion of killing a right-wing speaker will cause outrage and mouse clicks, whilst a discussion of killing a racist speaker will illicit indifference or a beyond the grave visit from our old friend Evelyn Beatrice Hall.