I have a few people that I really probably should hate, but time just fades it.
In two of these cases, the people I "should" hate were abusive and manipulative just out of sheer stupid insecurity. Verging on what I couldn't call anything short of evil, even though I'm not sure how I feel about using a term like that.
The thing is, I removed myself from their sphere of influence, and so now I have no reason to hate them. They remain influential to a person I dearly love, and that has done more than anything else to make me distance myself from that person. Which sucks, because I miss her, but until she gets those people out of her life, I can't really have her in mine.