Actually, Columbine was 15 killed, and 21 injured. And the worst was Virginia Tech, with 33 killed, and 25 more injured.
Regardless, trying to prove which country has had the worst shooting fatalities sounds like a pretty morbid contest where the trophy is shame. And proves what? That everywhere has some pretty messed up people? You guys, us guys....we all lose that one. No one wins.
Plus, I do believe another quote from that book teaches something along the lines of "let those without sin, cast the first stone".
Hate doesn't always come from sickness. Sometimes, rash decisions are made from far less meaningful reasons. Simply wanting to harm another out of petty resentfulness, jealousy, envy, anger...The instrument doesn't matter, if the intent is there. Evil can have many avenues, and is simply like electricity. It will take the easiest path of least resistance.
If that's been a problem since biblical times, then a change is needed. But so long as ill intent is out there, rules will be ignored, location doesn't dictate behaviour, and actions speak louder than words, no matter how much change is wanted. As long as it took to make it, it will take to break it.