Add to that - that death is paraded on the internet and people have become numb to it. For example, the popular YouTube guy showing the body hanging from a tree.
When did it become okay to flood the world with images of dead or dying people?
The slo-mo, bodies exploding with bullets, bloody "BONNIE AND CLYDE" movie began the gruesomeness, which now is in movies and T.V. shows and the YOuTube crap.
With each passing year, this stuff has become more and more acceptable. Well, perhaps not "acceptable", but show and/or talked about, so that the populace become inured to it.