We did this exact same song & dance with Postal when it first came out. The premise is pretty much identical, and the gameplay is almost identical as well with it's isometric perspective.
It's an interesting concept...it basically sets up the story line to let you be the movie theatre shooter / columbine shooter, without having to create a MOD or fantasize about it yourself with your own story lines.
Call of Duty dabbled in it not too long ago with the airport massacre.
Look at Grand Theft Auto...you are basically a mass murderer there, killing and running over people, getting to live out sick fantasies of crazy no holds bar straight up murder
Is postal or Hatred....really much different? I don't think it is.
Yet when the opening cinematic openly states your intent to murder innocents...now we get up in arms about it?