This is not about University Speakers, but the hall in the campus being rented out to politicians / political speakers. They can be very controversial ones as well. Remember that a certain individual called Trump mocked a disabled reporter on one occasion, though it may not have been at a University campus. The students not necessarily want such individuals to be present on their campus and that is why they demonstrate against their presence. Anyway you object to people being allowed to mock disabled individuals, and should that same rule not be applied to attacking individuals based on their race, ethnicity or religion?
Well, if it is a Pro-Life speaker then why will those who believe that abortion is murder, object to such a speaker?? They will agree 100% with the views of such speakers.
Remember all the same that Pro-Life and Women's Right to decide about their own bodies will go across racial, and ethnic lines. As long as the University has no problem with likewise allowing in those who are Women's Abortion Rights speakers as well, then it should not be a big issue. The students can then sit together and discuss the pros and cons on both sides of the aisle. But when there are racist speakers that really offend those based on certain ethnicities or religions then that is a different kettle of fish!!