Yes, control what others do even if only words are involved.  The reason this approach has problems is because it means that those in power make the decisions about what is acceptable and what is not.  Power corrupts.  Some with power might get the ideas that they are better than their fellow citizens.  But that is precisely the problem we face.  Each group thinks it is better than some others.  Any call for lack of tolerance, zero-tolerance, actually teaches the children and all who observe that the right of control exists which by extrapolation each person may expect to apply to others regardless of the slant of their beliefs.