A good defense of free speech from UC Berkeley chancellor Carol Christ:
Nonetheless, defending the right of free speech for those whose ideas we find offensive is not easy. It often conflicts with the values we hold as a community — tolerance, inclusion, reason and diversity. Some constitutionally-protected speech attacks the very identity of particular groups of individuals in ways that are deeply hurtful. However, the right response is not the heckler’s veto, or what some call platform denial. Call toxic speech out for what it is, don’t shout it down, for in shouting it down, you collude in the narrative that universities are not open to all speech. Respond to hate speech with more speech.