I can tell you exactly why it is happening. First, leftists have eschewed religion and prayer from the schools and have initiated a war against Christianity. When our schools included these topics, there was significantly less violence in the schools, primarily demonstrated by fist fights by overly hormoned males trying to impress a girl.
Second, neither the schools nor the parents teach personal responsibility or respecting others. This is one of the reasons that bullying has become a national epidemic. Again, these are things that religion and prayer teach.
Third, most of the kids are bored and frustrated with the school system. They know that they are being screwed by a school system that fails to teach them the tools and skills they will need to guide them through the rest of their lives. As a result of their frustration, they act out and often resort to violence as a means of venting their frustration and rage.
The fact is that for all the nonsense that has been introduced into the school system, kids today intrinsically recognize that they are being short-changed by their education. Back when I was in school (shortly after the invention of the wheel) there were an average of 33 - 35 kids to one teacher. No teacher’s aids, no helpers; just 1 teacher and 35 kids. We learned more and were demonstrably more prepared to enter the world outside of school when we graduated.
The left and its unions have turned the public school system into a jobs pogram for other leftists who don’t want to work and especially don’t want to teach. It is NOT a coincidence that, across America, the college of education at most universities has the lowest entry and graduation requirements.
Actually, you missed one point: CBS was complaining that the reason for all this violence is that there is no gun control. CBS and all the mainstream media should look foremost at themselves rather then the NRA. If they showed common since morality and love of God and nation in their programing, instead of all the ruthless violence and sex in their programing that kids see day after day, they are the ones to blame. After watching all this violence, human life becomes dehumanized and they think nothing of killing. They even try to outdo what they just saw on TV.