He was, however, a good barber. Such a nice man, always so quiet and polite. Very kind to animals.
But now, let us consider, can we make the sentence, "I used to be a bad man"?
Yes, I think so. Redemption is possible. (Probable? That's another question.)
So, perhaps, a bad man is someone who persists, for whatever reason, in badness. So a bad man on a deserted island is still a bad man. Something remains inside.
What is the something? A persistent wish or desire, perhaps not under conscious control, to do things that harm others?
"Bad" is only defined in terms of effect on others? (Potential or expected effect?)
What of, say, something that a person will do naturally that will harm some and not harm others? A domineering father to a fragile child, say. ("I was a bad father.") Or, say, a strait-laced prude marrying someone in need of physical affection. ("She was an awful wife, forever jumping on me!")
Is it always about the other person's needs? Or perhaps, the other person's rights? But, nonetheless, always "the other person"?
It seems like it must be, mustn't it? "Bad" is a moral term and "people" are the objects of morality.
So-o-o... it's all relative?