Unfortunately, I don’t think the author’s premise is correct. There was a shooting at an Amish school in Pennsylvania a few years ago, along with shootings at private universities like Oikos in Oakland, California. It’s a symptom of a deeper national rot.
The moral rot is so pervasive that it has infected both the public and private spheres. The followers of Alinsky,Marcuse and Gramsci have been very effective in their work. Satan’s little helpers.
The shooting at the Amish school was not by any student there - it was an intruder if I recall.