Killing Innocent People in an Airport in Call of Duty Modern Warfare 2: No Russia

The No Russia part of the campaign seems really disturbing in Call of Duty Modern Warfare 2.  The thought of killing innocent people in an airport really makes you think how something like this could happen in an airport in the United States.  If you think the movie Paranormal Activity is scary, and prevents you from sleeping this part of the game may be worse.  It really does make you think.  I will never feel the same in an airport ever again.

How could the developers even make the No Russia mission in the campaign?  Do they feel guilty about it?  Are they the mafia?  Are they terrorists?

The game graphics, and artificial intelligence seem so realistic which makes it even scarier.  It is the most terrifying thing in a game I have ever seen.  If you didn't know it was a game you would be screaming in terror, and probably never step foot into an airport again.

The problem is I still can't put the game down.  I simply love playing the game.