Are you serious?
This might be the most idiotic reply to anything ever said.
He said he understood WHY someone would do it. Not that he understands that they happen. Being bullied and picked on can lead to some nasty things in high school. Last week some kid finally had enough and beat the living crap out of some kid after he pushed him too far. The guy who was picking on him had a broken nose and lost a good amount of blood in the first 5 minutes. It took 7 teachers to pry the kid off of the bully.
Beating the crap out of a bully is totally different than shooting up a school. I have no words how you can possibly find any reason in what some sick SOB would even think of shooting up a school.
Innocent people died, innocent teachers died, and your finding reason in what they did? How dare you sir, go tell that to the families of their children that were shot.
I can only see one motive when a kid shoots up a school, and that they're a mentally sick POS. If you have a bully, you settle it one on one, but if you take innocent lives, your worse than the bully.