You know, I can't help but think that there is a small but vigorous minority that comes to certain sports events with an express intent to engage in vandalism and/or violence as strong as their desire to watch the game.
Annnnnd yet you don't see a lot of politicians suggesting reining in organized sports because of the excesses of the fans. Or the players, for that matter. Pop quiz: if you said "The last thing this country needs is our youth emulating the behavior of overly glamorized, steroid-fueled sociopaths whose major talent is their ability to smack the living daylights out of things with clubs", are you talking about video games... Or baseball?
Maybe all video games really need is another eighty years and some spin to get some homey, sepia-toned nostalgia associated with them.
Before anyone takes my sarcasm seriously: people have seemingly managed to go batshit over everything from Taxi Driver to the Bible. There are people in this world who just go wrong and become terrifying engines of destruction, either of themselves or of others (or both.) Trying to second-guess what triggers them is largely futile, and trying to pin a violent outburst on a single thing, like Doom, is worse than useless. Video games may be a part of a culture in which people become increasingly isolated and less prone to look out for one another (which may in turn mean that more "timebombs" go off before anyone notices little Jimmy is taking an unhealthy interest in fertilizer bombs on the Internet) but they're not the cause.