It was during the happenings of the second world war that many homosexuals were killed and were being experimented on in concentration camps across Europe. If the wartime documentations are to be believed, then the person behind all this might have been gay himself.
According to spy dossier designed for the allies, Hitler had shared houses many times with compatible blokes, having sexual encounters with many of them.
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..."Hitler derives pleasure from looking at men's bodies and associating with homosexuals. His personal bodyguard is almost always 100% homosexual. The belief that Hitler is homosexual has probably developed (a) from the fact that he does show so many feminine characteristics. And (b) from the fact that there were so many homosexuals in the party during the early days and many continue to occupy important positions."
"Hitler tried to present himself to the German people as a contented heterosexual bachelor (having been advised to do so by propaganda chief Joseph Goebbels) but this "false personality" was very far from the truth. While the Nazi machine began to persecute homosexuals, to imprison them and then to murder its own gay SA leaders, Hitler was enjoying a secret gay relationship with Julius Schreck, his personal Munich chauffeur and former bodyguard who would be his last male companion."