What is the point you're trying to make? The servicemen and women killed in action in Iraq are dead. They probably wouldn't have died if we weren't in Iraq. I can come up with a number of reasons justifying the war in Iraq, but suggesting that they would have died in an accident anyway or been killed in a street crime in the states isn't one of them.
The point is - The casualty count in Iraq does indeed include self-inflected and accidental deaths. Figures show that the casualty rate in Iraq is not very different than during times of peace. What people (like you, apparently) are implying is that, if we were not in Iraq, there would be no deaths in the military. That is plainly false.