There is absolutely no indication that the shooter in this case was insane, and we know that other shooters are very often entirely sane. They know what they're doing is wrong, and horrible, and that's why they want to do it. And we know that there were always genuinely crazy people and lots of guns in America, and we know that this happens much more often now -- at the hands of sane people -- than it used to. So if I haven't allowed to wallow you in your Oprahfied urge to explain this away as a problem of pop psychology or a failure of "society," you're welcome.