If additional people are armed, law enforcement will be delayed from reaching the active shooter and possibly target armed but innocent students.
In addition, having armed but untrained students and visitors who are unaccustomed to being in life-and-death situations may well result in those individuals shooting at one another rather than the active shooter or accidentally injuring or killing bystanders. [More]
Meaning these three oath-breaking badged stooges oppose your being armed anywhere, because the same "logic" would have to apply.
