School “massacres” are rare events; I’m not looking it up, but I wouldn’t be surprised if they were literally statistically insignificant compared to other issues. Much more common than some loner at a suburban school snapping and shooting up the place is the student or intruder at an urban school, sometimes gang affiliated, who bring weapons into the school. People tend to forget about it exactly because it’s relatively “common” as compared to the suicidal “An Hero” scenario. “An Heroes” are paid a lot of attention partly because they’re so rare, but the great bulk of weapons incidents in schools do take place in urban schools, just like the great bulk of all violent crime takes place in urban settings across the board. More people, more perpetrators, more victims, less room.