Some historians believe that such behavioral problems have been with humanity for a long time. Many of them believe that the people we know as psychopaths, sociopaths and serial killers would have been torturers, hangmen or inquisitors in centuries past. Now that such behavior is condemned, we're finally taking notice.
I hate to break it to you, but sociopaths hold some of the highest offices in government/corporate power. Their behavior is far from "condemned".
I agree with your general point though. The content of videogames (or any art/media) is a reflection of society, not to other way around. Actually discussing/addressing the shortcomings of society is a lot harder than just creating a scapegoat for political gain though.