Universities that try to protect their students from hearing controversial opinions do them a great disservice. One might be able to make the case that children should be shielded from certain ideas, but university students are adults!
If you are old enough to vote, you are old enough to discuss public policy. If you are old enough that no one should stop you from viewing pornography of your choice, then you are old enough that no one should stop you from listening to political opinions of your choice. If you are old enough to own a gun or join the military or police force, you had better damn well be mature enough to peacefully negotiate with those you disagree with. If you are old enough to be trusted with driving a car or raising children of your own, you are old enough to trust to fill out a ballot. It is time for university students to choose: Are you adults or children?