What needs to be understood is, you don't prevent something by adding more of the same.
I've heard many different things. That school shootings are part of a vengeful God, who hates that we took the bible out of our schools. That if the kids had been armed with guns, the shooter would have been killed before he killed all those kids. Etc.
What doesn't make sense is the idea that a 5 or 6 year old would A.) be mentally capable of taking down a 20 year old college student, and B.) be physically capable of taking down a 20 year old college student. Nevermind the argument that some of the fatalities would have been attributed to kids killing kids by accident, or the shooter using kids as a shield. No matter how geeky this guy was, he still was much more powerful than the kids.
This sicko probably targeted kids, because he knew he couldn't overpower college students. He hated himself, and others, and wanted to show the world how much he hated it. It's just another Columbine, although twisted, because he went after 6 year olds instead of 16 year olds.
Either way, pray for the victims, don't shed a tear for the killer. He doesn't deserve it.