That should be the principle that guides lawmakers as well: The antidote to speech one dislikes is more speech, not less. Attempting to silence ideas one finds repugnant is bad policy not only because it rarely makes them go away but also because it limits the possibility that new ideas will emerge to bridge deeply held differences. A tolerance for unwelcome ideas is exactly what is needed if the Israeli-Palestinian dispute is ever to be resolved in a way both sides can live with, and that cannot happen until all parties to the dispute feel they have had their say and that their concerns have been acknowledged. The state's public colleges and universities are as good a place as any for that discussion to proceed.