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
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See Robert Jay Lifton, Les médecins nazis. Le meurtre médical et la psychologie du génocide (Paris: Robert Laffont, 1989) 502.