The Rev. Jim Wallis, head of the Christian group Sojourners, calls that kind of thinking "morally mistaken" and "religiously repugnant":
"The world is not full of good and bad people. That is not what our scriptures teach us, but that each individual is both good and bad … and when we are bad or isolated or angry or furious or vengeful or politically agitated or confused or lost or deranged or unhinged, and we have the ability to get and use weapons only designed to kill large numbers of people, our society is in great danger."