Bullies have a lot of issues themselves and look for a scapegoat instead of doing something to cope better.
I have no empathy for them. Being insecure, having family issues, being abused by your parents, whatever. Nothing of that is a f*cking excuse to make someone's life miserable.
If any of my bullies came to me today and told me they're sorry, but their mommy didn't give them enough hugs as a child so they chose to beat me up everyday to relieve their pain, I'd tell them to screw themselves. I don't care about their reasons, whatever they might be. Call me hateful, call me a jerk, I just don't feel anything towards them. We are not anyone's punching bags.