Well, consider the statements of IHMan about how liberals caused this increase in violence you might want to know facts about the phenomenon in question right? Like the fact that first school shooting in the Colonies occurred in 1764 in PA during the conflict known as Pontiac's War: Enoch Brown Massacre it was called 11 dead when 4 Delaware Tribesmen attacked a school house.
Then in 1840 we have the first prototypical shooting in a school it seems with a Professor of Law in Charlottesville, VA is shot dead by a student. Then the trend seems to waffle between parents killing teachers over corporal punishment or students avenging themselves upon teachers who have been punished or friends and siblings who have been punished. Then you have the accidental shootings where guns are brought into school for plays or drill and they kill someone. Then you have parents shooting up school meetings and so on. Then you have teachers and parents shooting it up. Sometimes you get kids dueling it literally over games. In one case I the 1920's a janitor shot a student in a crowd of boys trying to enter a locked gym.
And the stories go on and on and then you realize that hey maybe guns aren't the right thing in schools.
en.wikipedia.org