With Abortions, discussion about assisted suicide for the sick and infirmed, along with other things, we have completely devalued life in this country. Therefore, it is not a big step for someone with problems to see murder as an option. That along with the breakdown of the family unit in America. 
As has been said many times before, guns have always been around and used to be in pickups at school so you could go hunting before or after. Also, bullying has always been around. But we didn't used to see school shootings like today and we didn't used to see as many suicides because of "bullying". Because in the past Parents taught their kids to respect others and respect life. And also to respect yourself and not to pay so much attention to what other people think about you. Nowadays they're taught that they are victims and if you are mistreated something should be done.
And, bringing this back to catfish's meme about God, all of these issues are directly related to the fact that this nation has been steadily turning away from God to the point now of being downright hostile to Christianity.
We have to stop the culture of  "whatever seems right for the individual is ok" and get back to some belief in a moral standard or things will just continue to get worse.