Even if there is a link between violent people and video games, why do people always assume that the game is at fault? Has nobody ever heard of causality?
There are 2 possible ways to look at such a link:
(1) Playing violent video games made the guy think that it was ok to kill. or (2) The guy already had violent tendencies, and playing the violent games was simply a symptom of an underlying problem.
Even though option 2 is far more likely to be true, it doesn't make for good news. With the media always writing the "version of the truth" that sells best, it's no wonder that so many people think that violent games are the problem.