Ah, but Stalin was also known for his personal charm when it suited him.
Both Hitler and Stalin were genocidal maniacs but Hitler seemed to treat it as something that other people did. It doesn't surprise me that Hitler had Jewish cook. Hitler only killed the "bad" Jews in his eyes. Basically all the Jews except the ones he knew.
Stalin became more personally involved. He took personal interest in wiping out people.
Look at the evil in the world and it all has its charm.....that is how the devil gets it's foothold on people through his charm....scary isn't it