Aw, NWTR - it figures you'd have compassion for these people.
There was an older boy in our neighborhood that most of us used to fear because he liked to beat up people for no apparent reason. He attacked my friend's little brother one day - fractured his skull with a rock and caused a loss of vision in one eye and a seizure disorder. My friend and I built a "fort" behind his garage, and planned our revenge. We figured his own property would be the last place he'd look for us.
Years later I ran into him at the gas station, and he acted like we were old friends. It took me by surprise because I had considered him my biggest enemy. I realized then he never had ANY friends when we were young - maybe that was why he was so mean. I couldn't help but feel sorry for him because he appeared so lonely. I suspect the only form of communication he was taught was intimidation and brutality. How sad.