The interesting thing to me with this instance of the euphemism treadmill is that people seem to have either amnesia or zero cognitive dissonance about words that were once deemed insensitive and mean the same damn thing. 'Retard' replaced 'moron', for instance, because moron was deemed insensitive in the medical world. Before that there was the gamut everyone knows of: idiot, stupid, etc. These words are only effective as insults because of their meaning, but proponents of suppression pretend the words live in a no-man's land of having no meaning, existing only as being derogatory.

The only thing more insane would be the expectation that insults of any kind, for any reason, no longer be tolerated (some do suggest this, which is at least consistent).