If we expect students to be grown ups and handle being intellectually challenged by Marx, Sanger, Derrida, and Foucault, sexual studies pioneers, environmentalists and anti-war spokespersons, they can certainly handle being challenged by proprietors of the Right. This wasn't some Neo-Nazi production for Pete's sake. It doesn't qualify as hate speech, yet it's being pilloried as if it were the equivalent of such.
Why do we presume it is appropriate to privilege the views of one group over the other, when it certainly wouldn't be tolerated by left-wingers if the shoe was on the other foot? The value is in having a venue to engage in different ideas and debate them with a semblance of fairness. If material is controversial, you still provide an avenue for it to be displayed and then you can have additional discussion. That's what the university is supposed to provide.