Also don't forget that Bill Clinton was in command during the U.S.'s engagement on the balkan war. No one claimed (nor demanded) that democrats are pacifists.
The National Socialists actually started prototyping methods of mass murder through the so called 'euthanasia' project, which basically meant that all 'unworthy life' had to be put to an end for the sake of the victims of such a fate (meaning psychologically sick people, physically impaired, homosexual persons and people who needed constant medical attention due to their old age). In the end it was all just a huge scam to save money on the social/medical sector. First experiments included a bus with barred and painted windows which had it's exhaust fumes redirected into it's interior. There were also hospitals who had a shed with a diesel engine outside, whereas the fumes were redirected into that shed and hospital personal had to crowd 'unhealable' patients and block the exit and then starting the engine. Usually relatives of these people got a standardized note of deceasment claiming the patient 'suddenly died of a lung infection' or similar excuses. This was just a prelude of things to come. The whole holocaust ordeal was planned from day one and all along of Hitlers delusions of applying a twisted version of Darwin's evolutionary theories to human society. Today one can safely assume that the whole holocaust ordeal was planned by Hitler from day one. Just my 0.02$ on this topic.