Heydrich remained in the elite Aryan order but was haunted by the persistent rumors and as a result developed tremendous hostility toward Jews. Heydrich also suffered great insecurity and some degree of self loathing, exampled by an incident in which he returned home to his apartment after a night of drinking, turned on a light and saw his own reflection in a wall mirror then took out his pistol and fired two shots at himself in the mirror, uttering “filthy Jew!”
He doesn’t know Hitler would have had him killed just for being ethnically Jewish also why saying murder is bad while supporting Hitler
(Source.)