It was said that Hitler was vegetarian... Whether or not this can be proved or disproved is irrelevant at the moment. But let us for one moment assume he was, imagine how warped his whole perception was? He would refuse to kill animals but did not bat an eyelid when it came to other humans...
Here is an interesting read on this matter. It is an anylysis or a hypothesis even:
Food writer Bee Wilson is of the opinion that: "His distaste for meat knew no pity of animals." She went on to note that: "At mealtimes he often boasted - in graphic detail - of a slaughterhouse he had visited in Ukraine. It amused him to spoil carnivorous guests' appetites." This idea, however, is not supported by the BBC series The Nazis: a Warning from History. In this series an eyewitness account tells of Hitler watching movies (which he did very often). If ever a scene showed (even fictional) cruelty to or death of an animal, Hitler would cover his eyes and look away until someone alerted him the scene was over. The documentary also commented on the German animal welfare laws that the Nazis introduced, which were unparalleled at the time. The German psychoanalyst, Erich Fromm, believed that Hitler's vegetarianism was actually a means of atoning for the death of his half-niece Geli Raubal, as well as a means of proving to himself and others that he was incapable of killing.
On the other hand, author Rynn Berry, a vegetarian and animal rights advocate, maintains that although Hitler reduced the amount of meat in his diet, he never stopped eating meat completely for any significant length of time. Berry argues that many historians mistakenly use the term "vegetarian" to describe a "flexitarian" i.e. someone who simply reduces their meat consumption. This view is consistent with the actions of Hitler's physician, Theodor Morell, who from 1936 almost until Hitler's death by suicide in 1945, gave him "quack supplements" which contained animal components. Other injected preparations contained placenta, bovine testosterone and extracts containing seminal vesicles and prostate to combat depression. At the time, extracts from animal glands were popularly believed to be "elixirs of youth". Traudl Junge, who became Hitler's secretary in 1942, reported that he "always avoided meat" but that his Austrian cook Kruemel sometimes added a little animal broth or fat to his meals. "Mostly the Fuehrer would notice the attempt at deception, would get very annoyed and then get tummy ache," Junge said. "At the end he would only let Kruemel cook him clear soup and mashed potato." In addition, Marlene von Exner who became Hitler's dietician in 1943, reportedly added bone marrow to his soups without his knowledge because she "despised" his vegetarian diet.
Biographer Robert Payne, in his biography of Hitler, The Life and Death of Adolph Hitler (Praeger, 1973) theorizes that the image of Hitler as a vegetarian ascetic was deliberately fostered by propaganda minster Joseph Goebbels. In the book, The Mind of Adolf Hitler, it is said:
"If he (Hitler) does not eat meat, drink alcoholic beverages, or smoke, it is not due to the fact that he has some kind of inhibition or does it because he believes it will improve his health. He abstains from these because he is following the example of the great German, Richard Wagner, or because he has discovered that it increases his energy and endurance to such a degree that he can give much more of himself to the creation of the new German Reich."