I think that really, the whole arc is masterfully written because it's almost sympathetic. Weaved into the flashbacks to his own thinking, and his conversations with other demons (and that plot setup with the Hero of the South) you get an interesting picture of demonkind that shows that they aren't exactly uniformly monstrous sadists, and that by and large they, like humans are also just trying to survive... but as things stand, human survival and demon survival is almost certainly incompatible and you can't let the surface sympathy distract you from the fact that they are utterly alien.