I do not believe this has anything to do with political correctness per se - there are no disadvantaged groups beyond the students exposed to this horrible person. This is just really poor decision making on the part of the university. Who allows this nonsense? And yes, where were the parents of the other students on the floor?

Learning to communicate, understanding how people think are not taught in STEM courses, so liberal arts are a valuable component of education. And logic is often taught as a component of philosophy.