DubDub, I'm going to respond to your original question (yeah, I know, that's a rarity here! )
Let's say that our wishes/feelings towards others are on a continuum, with completely neutral feelings at the zero point. To me, good will would be on the positive side; that is, not neutral: actively wishing good for others, as opposed to, "Well, it would be nice if good things happen to her, but if not, I don't really care". So--in this framework, the opposite of good will has to be actively negative. And I would call that a number of things, starting with ill will and menace.