Listen, I realize the guy was nuts, and if he was hellbent on killing some one, he was going to do it. But seriously regulating guns would make crimes like this harder. That's a good thing.
The government sanctioning the power for citizens to have the capacity to enact "point and shoot" death is just bizarre. The answer may not be enacting swift, broad laws that make guns illegal (though it might be), but it seems to me that continuing to produce guns and ammunition without change seems like a strange strategy to stop this problem.