Most schools do have a skewed view of firearms and their owners also. I don't know, they're probably just misinformed people that think they are doing the right thing for the students they teach. Even though it often has the opposite effect.
When my son was young, 9 or so I took him shooting for the first time. He was so excited he took some empty 22 shells to show his friends in school. Needless to say I had to have a meeting with the principal. Oddly enough, and happily I might add, she said what I do with my son on my own time is my own business. Just make sure he keeps it at home. Needless to say I was very surprised. I expected at least a suspension or possibly an expulsion. The determining factor I think is it is a private school. Had it been a public school they probably would have called in a swat team and had him on the news.
The thing is he didn't think he was doing anything wrong. Firearms are just a normal part of life to him. There is no mysterious aura surrounding a gun for my kids. They're just tools. They have been taught to respect them and stay away from them unless supervised but they're still just tools.