As long as it's not clearly hateful, universities typically allow greater freedom of expression than you normally get in a commercial organization, because the

As long as it's not clearly hateful, universities typically allow greater freedom of expression than you normally get in a commercial organization, because the ability to criticize the zeitgeist and common sense belief is critical to the development of the arts & sciences. Of course, there is typically a tension between allowing academic freedom and pleasing whoever holds the purse strings. University administrations often have to very carefully balance between upsetting their income sources and devolving into a propaganda machine.