OMG, stop with the video-game-blame-game!
Video games do not cause a person with a proclivity to commit violence to then commit said violence! This harkens back to the days of Dungeons and Dragons, when all the parents got into an uproar in the early 80s about it causing their kids to become Satan worshippers!
It harkens back to the days when WASP parents thought that rap lyrics would hurt the children and cause them to become violent offenders because rap music was dark, and had curse words in it! Now we have all these "parental advisory" notices on album covers about explicit language.
It harkens back to the time when cartoon like Tom and Jerry and the Roadrunner/Bugs Bunny were funny. Now they are apparently the opening salvo of leading kids to interminable violent lifestyles.
Don't pull "violent video games" into this, because you have conveniently left out pretty much every TV show and action film out there. What, so THEY have no effect, but video games do?