If you had not put the anti-violence message on there, I would have been mad. While the destruction of the Towers was cruel and wrong, it would be just as cruel and wrong to retaliate by doing the same thing. Say it was them...that means that the bombing was in retaliation for the USA supporting Israel, which commits terrorist attacks on them almost daily. And they commit terrorist attacks back on them, and back and forth untill no one can remember where the cycle began.
Sorry for not really reviewing the game, but I'm venting sice I'm so sick of these little kids saying "kill all the Arabs," showing how stupid and immature they actually are.
But anyway - it wasn't too offensive, although I don't find much fun in killing anyone in general.