Why did these people resort to shooting everyone?
I am talking about incidents like the one in University of Austin in September 2010 and the one at Virginia Tech in 2007? and others that keep happening.
I understand sometimes it has to do with mental issues but then I remember reading about this one that happened recently where the shooter (a student at some college) blamed the people around him to be trashy. (He had left a note and the note sounded quite sane.)
Is it true that some of these people had wounds inflicted upon them by the people they shot and they resorted to shooting as the only method of getting back at them?