This is an example of how students today believe that they have a right to be protected from opposing views and values — declaring any opposing statements to be “hate speech” or threatening conduct. There is a growing number of schools that reinforce and even encourage such objections — often targeting conservative students and faculty.
In my view, both posters are free speech and express political and associational rights.
One concern is that anti-free speech activities are rarely punished when faculty or students target conservatives. We have been discussing how faculty around the country are supporting the abandonment of free speech principles to bar speakers and speech with which they disagree. The most extreme form of this rejection of classical liberal values is the antifa movement. We have seen faculty physically attack speakers or destroy messages that they oppose. We have also seen faculty physically attacked and intimidated. In some of these incidents, other faculty have supported students in shutting down speakers or fellow academics (here and here).
Cruz-Caldera has promised to look into a new policy to address such vandalism (though clearly will not punish the vandals). Of course, there was a preexisting “policy” that once defined our schools. It was called free speech.