This is just stupid fear tactics because there really is a low amount of school shootings nationwide compared to the sheer amount of schools.
This whole fear tactic has been used to try to remove guns so that CEO's and other higher class people can stave off the coming anger against them.
The people pushing, and winning, the class war have studied the French Revolution and would want to make it impossible for regular people to fight against their private military contractors. Make people afraid and you can make them choose against their own interests.