Having served I know that those who sign up for the military realize there's a chance they'll die. They hope it will be for a good cause but quite frankly, they know it might not be the case. Our military leaders do their best to only commit our troops (or special ops), if they feel it's necessary. Sometimes they make a good call, sometimes they don't because success is never guaranteed as there are so many variables.
Military personnel are assets to be deployed sometimes just as deterrents. They are like chess pieces. I don't know what the percentage would be, but there's no doubt in my mind that most parents understand how it works. They don't normally blame the government for the loss of their child; it's what their son or daughter signed up for.
I know a lot of people are upset about the number of military deaths in places like the middle-east and it’s tragic but please know the minds of those serving and the families who support them, have a different mentality than most civilians. Service to their country, even if it's short-lived, is a good life because as someone once said: "The length of your life is less important than its depth." By the way, please support the military and see the movie: "Thank You for Your Service."