Call of Duty Modern Warfare 2 Controversy

Even before the release of Modern Warfare 2 yesterday, the people over at Activision are already in a firestorm of negativity. When people found out that in one of the scenes in the game, a airport is hi-jacked by terrorists and they go a shoot innocent civilians and security guards patrolling the airport. People are up in arms about the scene because you can choose and play the scene, they give people the choice of either playing the scene or skipping it. I know that it is bad, but what is the difference between this scene and something like the movie Die Hard. Why is it that a movie can do something like this and it is okay, but when a video game does it, everybody is all up in arms about it. Why is it when a video game does something, people always want to protest it.