I’m aware that Hitler was an animal lover and vegetarian. He was also a mass murderer, which was my point.  Not sure what yours is; it appears to be just more “whataboutism” from a likely Trump voter, since they engage in that ridiculous red herring in order to try and conflate the real issue in order to try and cover up their own wrongdoing and hypocrisy. 
Check out the series on Netflix “ Einsatzgruppen: The Nazi Death Squads.” I suspect you’ll really enjoy it.  You might even pick up some pointers to use when you initiate your Feral Cat Death Squads. After all, the Nazis took slaughter house practices and used them to kill Jews and others they considered vermin.