Can I just take you up on this point? Several people have made it. Don't take the following personally, I mean it to everybody.
Why is the wholesale slaughter of your fellows okay if they've done bad things? Nay, you've been told they've done bad things. Why does innocence even come into it at all?
You kill a man or woman, you take away somebody's son or daughter, somebody's brother or sister, somebody's best friend, someone's father or mother. You take a life.
Why is that fine and dandy if they're bad people?
Killing people is one of the only objective wrongs in this world, and nobody has any right whatsoever to do it, even in revenge. That makes you just as sad an excuse for a human being as anybody who has killed too.
So why then, is this in any way bad? By playing it, you aren't killing anybody, you're putting yourself in that mindset, for fun. If you wanted to go out and do it for fun, you would. Instead, one plays a game about it.
Some people don't join the army, they play Call of Duty, or Bulletstorm, or whatever the hell they like. Games in which you kill people are nothing new. They're archaic.
This game has every right to be made, played and enjoyed, just like films about this kind of thing, just like paintings of this kind of thing, just like books about this kind of thing. If you don't like it, fine. 'The medium' as it is called should be allowed to depict anything it wants any way it wants.
Oh, and to all you people quoting Extra Credits, I got the impression from their video on 'Six Days in Fallujah' that they regarded games that dealt with touchy subject matter as good things, not bad things. Just some food for thought.