@reasoning logic,
The way I have learned history RL and the way I believe it to be true was at first the concentration camps were holding areas for Jewish refugees displaced by Hitler's wars...
Then German commentators (Aryans) started writing propaganda about the "Jewish Problem" and things went downhill from there. They talked of expelling them from the countries in question until they eventually became bold enough in their propaganda to suggest "extermination"... When allowed, racists become gradually more emboldened to attack those who they feel are inferior.
The quaint little music theaters were converted into gas chambers and the extermination net was widened to include all "undesirables". i.e. People with odd shaped facial and cranial features... Homosexuals and anyone deemed not "Aryan".
It all depends on what part of the war you were in. There was much more of a chance to escape at the beginning but once the German killing machine was in place escape was near impossible.
Horrible experiments were performed on Jews, those of other races and people with handicaps were also exposed to hideous forms of human torture. The Nuremberg trials convicted these monsters and saw to their executions.
Just consider the racism in the republican party, it is not a myth, there are hateful, bigoted and disgusting racists in the republican party and if given the same chance the world could once again spiral down into such deprivation, chaos and evil.
Do you doubt the lynchings of blacks in the old south RL? Well the German extermination of Jews was no less real... This propaganda about the holocaust not being real is put out by the same racists, Aryans and today even some Muslim deniers.
All to express their hatred for Israel.
People are people and we are all equal and part of the same family of humanity... Anyone who thinks racist or bigoted is the lesser of our species...