I’m a teacher. The question I pose to you is blunt and uncomfortable: If a crazed gunman entered your child’s school, would you want me to kill him? Statistically most campus killers are young males in their teens. I’ve been asking myself: Would I kill a gunman attempting to murder your child? Don’t be enraged by my self-questioning: The killer may only be 13. I’ve taken 13-year-old students to mental health. One boy, six years later, drugged and violently raped young girls. He said, “I want to be like John Wayne Gacy and Jeffrey Dahmer.” I believed him. He wasn’t …