I hope your not a troll.
Its perfectly fine. and hears a few reasons why
1.) The game involves deaths of americans, Russians, Middle-eastern people, British people.. Its a game.
2.) You don't have to shoot anyone in the mission except the police when they attack.
3.) You can skip the mission before the start of the game and on the mission, its not needed for any achievement
4.) The mission brings realism, Thats the kind of shit that can and has happened before.