That is not at all what he's saying, as he explains in the second paragraph...
>>The shootings that disturb us so -- school shootings and the like -- do not disturb because there are four or more people killed, but because those people had nothing to do with anything.
Which I actually agree with. People have always (and probably always will) kill each other for particular reasons: money, personal hatred, revenge, whatever. But a targeted killing of a particular person or people is far different than indiscriminately killing whatever random people happen to be in some random place at a random time. The former is something you might see coming and perhaps avoid. The latter is unpredictable, unavoidable and therefore more frightening.
>>The shootings that disturb us so -- school shootings and the like -- do not disturb because there are four or more people killed, but because those people had nothing to do with anything.
Which I actually agree with. People have always (and probably always will) kill each other for particular reasons: money, personal hatred, revenge, whatever. But a targeted killing of a particular person or people is far different than indiscriminately killing whatever random people happen to be in some random place at a random time. The former is something you might see coming and perhaps avoid. The latter is unpredictable, unavoidable and therefore more frightening.