There is huge amount of literature on Holocaust. Systematic and ruthless murder of millions makes people to ask why it has happened. Many people try to perceive who were the ordinary SS men, the concentration camps guards, cruel barracks supervisors, cold-blooded Auschwitz doctors and others, the pawns of the Nazi murdering state machine, without their obedient participation Holocaust would be impossible.
The only thing I know about them that they were perfectly normal individuals according to the psychiatry standards of that time. I'm absolutely sure about my claim because I cannot imagine the Whermacht, the army of the Nazi Germany, without sophisticated psychiatry service controlling conscription especially to such elite unites as the SS. There is no doubt that medical science was developed in the Nazi Germany and according to their ideology all kinds of mentally disturbed people had to be expelled from the society and exterminated.
I believe only a few people in the world know the nomenclature of mental illnesses used by the WWII Germany doctors in conscription centres, but I'm sure that it contained at least the basic mental disorders like schizophrenia, and probably some kinds of psychopathy.
So such outrageous abnormality of human history was carried out by normal people, according to all psychiatric standards. I feel this is a very disturbing fact psychiatry wants to silence by all costs because it rises the question what mental, or so to speak, human defect is.