Premise: I never played the game, and I don't mean to, so it might be that all my points are invalid, you'll be the judge.
How can I feel guilty if there is no blame on me (no choices means no blame)? Telling that not playing the game is a choice, is like the developers saying "we made a game you shouldn't want to play, and in fact you are a terrible person if you see it from beginning to end", I just can't buy into that. Also, making a critique of something, by making an almost perfect copy of that something, and then adding a "you are bad for liking this" sign on it, doesn't strike me as a particularly interesting or brilliant deconstruction of a genre. If I can't make choices in a game, the protagonist isn't my avatar, is just a dude whose story I am following, like a movie, why should I feel guilty if Steven Seagal goes around killing bad guys in an action flick? Also, there isn't anything inherently wrong in playing those games (I almost never play first-person shooters, but I fail to see anything so wrong about them), and trying to make someone feel guilty about it is weird, to say the least. This is all metagaming at its finest, so I don't even understand how I can be emotionally shaken by this game, if it keeps making it obvious that it's just that, a game.
Do I need to be wanting someone to tell me I am guilty to like this game? Because I can't imagine what else I might be looking for in a game to like this message.
In short, I don't see the message as particularly intelligent or thought provoking, and I feel that (at least in the way it has been described by so many people) it isn't even smart in the way it delivers it to the players.