I don't know why everyone is praising this game's grittiness and comparing it to No Russian.
I have seen literally nobody make this comparison except for you, and No Russian by no means was gritty because it takes place during the day in an airport filled with life and colors.
Call of Duty 4 has nearly every single mission take place during the night or early morning when the sun is barely out and all the environments are gray/brown war-torn cities. Even the missions that took place during the day were still dark and they translated that same atmosphere to the multiplayer. They're trying to recapture that feeling with this new game because that's Call of Duty at it's best instead of the rainbow colored shitfest it is now.
The whole of MW2 revolved around its consequences and it was there to convey a message
MW2 was nothing more than a over-exaggerated Michael Bay summer blockbuster. I think you're looking a little too much into this. It was still enjoyable and fun to play, but most people still prefer how much more grounded feeling Call of Duty 4 had.
So far, this game just seems like it's going for shock value that's been in every Call of Duty before it
Seeing bad things in a game about war? Damn, consider me bamboozled.