I agree that a psychotic person is psychotic because of their upbringing. I don't feel that they are just born. Something has to trigger them somehow for them to hate and be careless. Himmlers father was obviously controlling, and had no emotions for his son. Didn't he tell Himmler that boys don't cry?
I don't think Himmler was psychotic, because he had a hard time observing murder. I feel that his father trained him to do what was told...Wasn't Himmler under someone elses control to sign the papers? I might be mistaken on this.....But I think Himmler had somekind of emotions, maybe not the right kind, but his father screwed him up....