I am actually using James' definition of hate, which is "When their utility function goes up, mine goes down."

I suppose that, trivially, this is not entirely accurate of me and Person X. If Person X eats a sandwich and enjoys it, I don't have a problem with that.

But if "hate" is unilateral in that fashion, no one loves or hates anyone: I have yet to encounter any individual who would, for instance, feel worse because someone else is enjoying a tasty sandwich. So instead, I used a more loosely defined variation on their definition, where "hate" can be allowed to occur on one axis of a person's life and not another.

Under this variation, I can hate this person for hitting kids and not along other aspects of their life, which is normal. But hating that person isn't evil, which is part of what I was getting at. I don't feel happier if Person X gets utility from hitting kids, even if I would otherwise value Person X. And I don't think it is evil to hate someone who gets their utility in a really messed-up way.

What might make this more difficult is that I am using a colloquial version of 'evil' but James' particular formulation of 'hate,' which may make things confusing since I don't think James' definition of hate maps onto what we normally refer to as hate.