And so the blame game starts. He was "infuriated" when an instructor made fun of his moustache. They are going to find every reason in the book to say that he was not personally responsible for the shooting. Big mean Americans just pushed him too far. He could have quit and run back to Saudi Arabia and beat his wife and raped young boys to make himself feel better. That is what THEY do.
https://www.yahoo.com/news/gunman-deadly-shooting-became-furious-131738938.html