I agree -totally- with Steve Shaw. No other word that we currently use so absolutely refers to one signal event. If 'shoah' becomes as immediately identifiable as this one I too will adopt it.

I object to any statement that brings up petty niceties, what-abouts and what-ifs in the conversation.

I referred to 'atrocities' in the opening post. That will do unless and until another such blanket moral catastrophe occurs.