Games like GTA have you as the bad guy... which is kinda weird
I know where you are coming from, but the point is that these kinds of games where you are playing the anti-hero don't cause people to go out and kill and there is little empirical evidence to say that it does.
Whilst I do
think violent gaming in general would be an influence, there are deeper and harder to answer issues with the twisted people who actually do go out and murder others and then blame it on a third party (the devil, that film, that book, that game)
Modern (western) society is pretty screwed up on this front.
B: Pinky, are you pondering what I'm pondering?
P: I think so, Brain, but where are we going to find a duck and a hose at this hour?