Tourist, I used to think a little like you before I went to Baghdad. I saw for myself at first hand how bad things are out there, and just just how brutal the enemy are.
I can undestand the US officer feeling like that; when you have seen so many of your friends whacked by an unseen enemy, or witnessed unarmed men having their heads sawn off, women shot in the back of the head or seen your countrymen jump from burning skyscrapers rather than burn to death, perhaps you will feel the same.
The Americans are indeed are allies and we should be grateful. I will NEVER forget what they did for some of my/our people, and I now understand what their "centre of gravity" is.
The officer in question was asked a question, in a war, and he was honest. I hope he stays safe..and that the Apache crew do too.