From <a href="http://squirrelbait.blogspot.com/">Squirrel Bait</a>

"Hate is the ultimate ego-booster.

No, really: think about it. You can love someone and still feel like something off the bottom of a shoe... but to hate someone, you have to think they are worse than you are... so much worse than you are, ever have been, and ever will be that you are justified in the way you feel about them. Truly self-loathing people do not hate... they try, but soon they start thinking of all the ways they suck more than the person they're angry at and soon all they're left with is a flaccid, wimpy kind of resentment."