It isn't a question of whether people kill each other, it is a question of how often, how callously, how unrestrained they are in their anger.
People have always killed, but now, they practice with video games, and it has become less of a dreadful act in the minds of many to do so.
There have been periods when killing someone was less socially acceptable, and times when it was commonplace. We are entering one of the latter phases.
“There have been periods when killing someone was less socially acceptable, and times when it was commonplace. We are entering one of the latter phases.”
I agree with the first sentence, I disagree as to where we currently are on that spectrum.