Comrade Al Sibboleth, I know you do want to stick around the muck here, but your mention of the euphemism made me curious. Growing up in history class I never remember hearing about extermination camps or really even death camps. It was only taught as concentration camps. Any idea when these more accurate (for Auschwitz, Sobibor etc) terms gained traction.
Not entirely sure, but probably started in the 1980s when you had all the various debates on the subject (some of which were... er... rather more edifying than
others) many of which spilled over into the 90s. A lot of re-examining of the morality of old assumptions went on afterwards (even if not as a direct consequence).