Dear Heinrich: Thank you for reading. I love Otto Dix since childhood. All the quotes pertaining to Hitler in this piece are from “A Psychological Analysis of Adolph Hitler: His Life and Legend,” produced in 1943 (!) by psychologist W. C. Langer with the help of Professor H. A. Murray (Harvard Psychological Clinic), Dr. E. Kris (New School for Social Research), and Dr. B. D. Lewin, (NY Psychoanalytic Institute) on request of the Office of Strategic Services (CIA in present) ((as indicated in the second paragraph.) It is a fascinating document that I really recommend reading. You will find the link to the full text at the bottom of the article. It is free and is broken into chapters for convenience. Best wishes to you.