It will make your blood run cold

The writer Elie Wiesel who, as (amazingly) a survivor of Auschwitz and Birkenau and Buchenwald, certainly knew why, once said these names should only be whispered in the dark for the next thousand years.
That's him in the photo, second row, seventh from the left:
Rico says there's another saying, just as important, that he once saw on a signpost, listing perhaps a dozen of these names, on a streetcorner in Berlin: Lassen Wir Vergessen (Lest We Forget).