I agree those are all problems and people suffer from them. But that doesn't excuse those unfortunate people from dragging others down to their level - ie the Iraqis. Or from killing people. Many criminals ruin other people's lives because they're desperate too - they also have no education or income. But we still lock up criminals even when we understand what drives them to do it. We want to make poor people's lives good enough that robbing others isn't the best option they have but at the same time, we don't excuse them for their crimes. Yet with soldiers, most people do excuse them.