At a time like this, a lot of frustration comes out in the form of deeply felt emotional convictions. Unfortunately, they do not hold the solution to preventing these horrors.
There is an answer, but it would involve the entire evolution of western society in respect to everything from entertainment to mental health screening and action to prevent young people from regarding human life as worthless, including their own.
Right now these incidents fall in the category of suicide terrorist attacks on innocents.
We must start guarding our schools as we do our courts and transportation points.