What are they going to do, conjure up old videos of guards justifying their abuses? Have the chamber cleaners who went mad explain that it was "just a job"?
When there is a crime against humanity, there are two sides:, the victim and the perpetrator. The perpetrator can never explain their actions against innocent citizens outside of primal, savage evil and hate and abuse of power that knew no bounds It's no more justifiable than someone torturing an innocent puppy, it was pure structured sadism that even the German leaders knew would drive their own soldiers insane.
I watched a British documentary on TV just last week that explained that the original approach by the Germans was mass firing squads, but German soldiers were losing their minds murdering innocent men, women and children everyday. Thus, their German leaders were forced to seek "efficiency" with distance between the soldiers and the chambers. Refer to it in todays terms "culpable deniability", or similar to firing a rocket on an target, immune to their suffering ("hey, I didn't kill them, the missile did").
The only lesson from the "other side", is to NOT allow government to have such power nor good men to turn their head until it's eventually their turn to be the victim.
This is one lesson I fear, humans refuse to learn. Whether it was suppression of domestic citizens to fight terrorism or the radical, Groupthink shaming, silencing and sometimes imprisonment of those they disagreed with during Covid-19, we as a species like to abuse minorities.
I will NOT subscribe to these activities, society is constantly "fooled again". I urge Americans to embrace this belief and not repeat your alliances with ANY nation that abuses citizes ad denies them access to justice...