It's pretty evident the ostracization and bullying are the real reasons. IIRC the Columbine kids were going to create a gas explosion too - and certainly would have if no guns existed. Facts are stubborn things :-/
GOES OUT OF HIS WAY TO OFFEND PEOPLE AND MOCK MARGINALIZED GROUPS ALL IN THE NAME OF "FREE SPEECH."; HAS THE NERVE TO CLAIM SOCIAL OSTRACIZATION AND BULLYING ARE MORE RESPONSIBLE FOR MASS SHOOTINGS THAN GUNS.