I havent seen any of the movies made about the subject, but it all depends on what angle and what "glorification" is made with it. If the game would "glorify" being those two kids, then its kindof... a sensitive subject definitley. Honestly, even if you are controlling a "mindless schoolkid with a mission to kill" it´s controversial, and in most peoples opinon slightly wrong, i would guess.
But that´s exactly what the deal is with ceveral shooters out there...
Many years ago, watching an action movie that, with today standards would be concidered weak and un-raw, was "giving kids bad ideas and influences etc etc etc".
A few years back, the violent videogames were to blame, especially since they were so realistic and so on. The very same videogames that today are graphically inferior to what you see on the VGshelfs. Of course, technology have leaped in a sick way last 20 years, but still.
My point is, that there are some products that the world may not be "ready" for yet. I personally think that "if this goes, everything goes", but the fact that if the "world isn´t ready" will mean that it might be a financial (and moral:) threat to the ones who back it up. In a few years, im sure we all will play the game(or some similiar game), laugh and think that it´s so innocent, just like SMB, or MegaMan is today :)