R. J. Lifton, one of the better contemporary specialists in Nazi medicine, quotes in this regard Dr Mikios Nyiszli, prisoner doctor at Auschwitz: "The most dangerous of all criminals and assassins is the doctor assassin". And R.J. Lifton continues: "The doctor is dangerous, as we now see him, because of his ability to split himself in a way that invests his assassin Ego with special powers, all the while he continues to pride himself on his medical purity."1
See Robert Jay Lifton, Les médecins nazis. Le meurtre médical et la psychologie du génocide (Paris: Robert Laffont, 1989) 502.