Agreed. However, I do think his choice of "Subhuman" may have been rather undiplomatic. His freedom to speak is less expensive than the cost of his expression to the conservative and traditional way of life.
One can be very effective without resorting to the sharp utensils. It's all about perception.
Even the choice of language depends on the venue. If this had been in a classroom or a dorm room or some other place on campus, then the student might be charged with disruption. But if it is unrelated to them, by what right do they disciple him? That should be up to the webmaster.