[mudblood]

"Macbeth to Lolita."

I'll defend to the death their RIGHT, as you put it. But when they try to make me sympathize with a pedaphile - a destroyer of innocents - they can count me out of their box-office haul.

[Borges]

As Macbeth makes one sypathise with a murderer and Lolita with a pedophile etc. I understand your point but if there isn't some redeeming feature about a character, no matter how fallen, then you have a straw man incapable of generating drama.