There is a fine, fine line of difference between "denying history" and "denying redepiction of history".
We recognize the historicity of certain events because some parts of history should never be repeated.
The spans of the simulation games genre(planes, tanks, ships, wargames..) is about as far as we can go considering this: due to the fact that the main factors of competition and destruction could be limited to depersonalized mechanical devices, or a vague description of human death, these computer programs we enjoy can be qualified as "games". Otherwise it wouldn't be anything better than a "snuff film" or a "pornography of death" - gross perversions of history.
That is why the games depict planes being smashed up, but not the people inside bloodily mutilated(depiction of bloody, bullet hole-ridden cockpits is about the absolute limit). Bombs destroying buildings, but not shattering people's bodies, and strafing, or strategy/war games with simplified/quickly disappearing human bodies. FPS games with blood and human bodies, but nothing that goes as far as to depict guts, how the human body is mutilated, torn, drilled and etc..(remember why games like DOOM series was viewed with such concern).
Also, that is precisely the reason why system that intentionally recreates or promotes historically inhuman and genocidal events, should never take place in a game.