New Killing Fields

Killing of enemy soldiers on a battlefield one can understand. But killing of innocent people in a university is something that at least I fail to understand. The gun law is obviously a culprit in the U.S. But is that the only culprit? Is there something dehumanising about our existence, like the nightmarish sci-fi stuff where humans were taken over by machines? Do we really not care about other people's right to live? Can anything be done to reverse the trend? Or are we destined to see a lot more of Virginia Techs and Northern Illinois' happening all around? Some people always felt that the veneer of humanity we wear is pretty thin. Maybe it's started wearing out.