If only it were so simple. What you are proposing seems to require universal acceptance of an authoritarian regime that sets the social rules which are, as you say, "not negotiable". Otherwise in a free society almost everything is negotiable and a precise definition of common decency is not so common, particularly across cultures. Similarly, trying to produce a complete and widely-accepted definition of intolerance is almost certain to elicit plenty of actual intolerance, but not enough to actually compile a complete and widely-accepted definition of intolerance.