Hmm. Interesting take.
I certainly feel what Shamus says about, effectively, catharsis. I had a really bad week a few years ago where I was in a head-on traffic accident (the other driver's fault entirely), and then got rear-ended on the way to the courthouse to file the accident report. For a while there, playing something like Saints Row and pushing cars out of the way before taking a short cut onto the sidewalk and down an unpaved hill gave me a genuine feeling of relief.
As far as Hatred goes, I'm less inclined to cite something like GTA as a comparison than, say, Carmageddon. Mowing down shrieking innocents for points, sometimes as the goal. The style is more cartoonish, and the individual deaths go by in seconds, but I think there's some parallel there, at least to the point where I'd hesitate to say that something like Hatred has never been done before.
Of course, Hatred clearly takes its time to, erm, "savor" the murder of its victims, and I can't blame anyone for finding that disturbing. As for me, I might have to actually play the thing before I feel I can render judgement.