Evil facial hair of doom

So Michael Jordan had a Hitler mustache in his new Hanes commercial. People are pissed and I understand why. My question is, do we as a society ever reach a point where a negative iconic physical trait can be used again? Have we retired the Hitler-stache for good? Would we be better off allowing it to come back, thus removing his power over it? Is there even any other physical fashion trait that is the same as this?