“Mr. Theodore Kaufman, an American resident, tries to calculate [in his pamphlet Germany Must Perish] how many doctors and how much time it would take to sterilize all Germans. This idea was eagerly taken up by Mr. Ernest Hemingway who defended it in his preface to Men at War on pp. xxiii-xxiv. (New York, 1942.) Scratch a "democrat" and you always find a Nazi.”

Source: Wikiquote