WW2 is routinely turned into a comicbook by videogames, movies and... well, comicbooks, but a realistic depiction of a school shooting scenario, in a realistic SWAT themed game, is supposedly too much?
I'll grant you that the former has acquired a mythical status, detached from reality (especially since Nazis are essentially pop-culture villains at this point) but that's mostly *because* of these depictions.