Some insist Hitler was a vegetarian probably trying to make vegetarians guilty by association, but the truth is that Hitler ate meat continually thought–out his life.
Now forgive me for being pedantic but one is not a vegetarian if one eats meat. Eating meat or not eating meat is the very criteria of being a vegetarian. Calling Hitler a vegetarian despite his meat eating is nonsense.
A good example of this gibberish was when in 1937 the New York Times reported that Hitler is a vegetarian afterwards listing his favourite meats. The New York Times wrote that he is a “vegetarian” who “relishes a slice of ham and … caviar”  clearly disqualifying him as a vegetarian.
Later reports repeat this strange state of affairs continued saying that he was both a vegetarian whos favourite food included meat and animal products such as Austrian liver dumplings (Leberknödl), eggs, and cheese   .
Now it might well be true that Hitler was enthralled by Wagners historical theories and believed the future of mankind would be vegetarian     and that he supported animal rights to some extent but that does make it possible for him to qualify for being a meat-eating vegetarian since that is an oxymoron and the bastardization of the English language and departure from common-sense
So please let us stop with the idea that Hitler was or could have been a meat–eating vegetarian.
 Otto D. Tolschuss (1937), New York Times, ‘At Home with the Fuhrer.’ 30 May 1937. “Where Hitler Dreams and Plans”
 Dione Lucas (1964), The Gourmet Cooking School Cookbook. p. 89
 Payne Robert (1937), The Life and Death of Adolf Hitler, (New York: Praeger, 1973), pp. 346-7)
 Fritz Redlich M.D (1988) Hitler: Diagnosis of a Destructive Prophet, Oxford: OUP,, pp.77-8)
 Toland, John (1976). Adolf Hitler. Garden City, New York: Doubleday. p. 256
 Thomas Fuchs (2000). A Concise Biography of Adolf Hitler. New York: Berkley Books. p.78
 Proctor (1999) Proctor, Robert N. (1999). The Nazi War on Cancer. Princeton University Press., p 136.
 Moore, Gregory. (2002). Nietzsche, Biology and Metaphor. Cambridge University Press. ISBN 0-521-81230-5. pp. 155-157
 Arluke & Sanders 1996, Medizin im Nationalsozialismus. Tübingen: Schwabische Verlaggesellschaft. pp. 144 – 150
 “The Mind of Adolf Hitler”, Walter C. Langer, New York 1972 p.54-55