School Shootings

I would think that in the mind of some deranged teenager, deranged by what God only knows but deranged just the same, the prospect of carrying one or more weapons into a school with the intent of using said weapons would be significantly impaired - deterred - by the fear of knowing that every teacher, administrator, and custodian in that school - any and every school - was highly trained and well armed to defend the lives and safety of all of the students and adults in that school. It must be an enormous temptation for a deranged young mind to know without a doubt that she (or he) can carry guns into a school and kill people when absolutely nobody in that school is equipped to fight back.
Call me crazy, but what else can we do if we want our children safe?
Turning these insane school shootings into political footballs and then not doing anything to protect the children, our children, virtually defines INSANITY.
Just one man's opinion I know... certainly not the official consensus. The official consensus is more like to let these shootings happen so we can fight political battles to disarm the public so nobody can rise up against Communism when it finally arrives.
Why aren't our kids insisting that the adults responsible for their safety are prepared to fight back? How can one deranged kid shoot up a school where no adult in that school is allowed to fight back? How did we get this screwed up?