I would say he's right but that is because neither is a significant problem ... The real problem is the desire to harm other people and/or significant mental disorders that goes unrecognized and untreated.
People who want to kill alot of people will find a way to carry it out in the absence of guns (I hear crashing a plane into a building was a touch successful), and will find a way to fantasize about it in the absense of videogames.







