Sadly the gun, the ammo are too readily available, the parents are irresponsible cretins and the kid needed help, but did not get it.
Had the school called authorities, he may have. And we would have had no shooting.
Look for opinions like this from others in the coming days
I expect that there will be many who express such a
limited view of this particular school shooting.
The school didn't have to call the authorities. There was a cop on campus. Although it is a contributing factor, at least on the surface, that's a diversion from the real issue.
That a gun is bought and the ammo for it is purchased immediately following is what created a circumstance in which the power to act with the gun was delivered into the hands of an obviously mentally ill family.
The school shares culpability, yes, but don't make them the focus. The killer is the killer because of the ready access to weaponry and the ammunition, and because we live in a society that ignores its own responsibility to provide mental health care to those who need it.