I believe two things.
1.) The bravery and courage it takes to enter a warzone and carry out your duties as a soldier and go through the psychological and obvious physical pain is something special.
2.) Yes, all the fighting and dying is done in vain. He may have done it for the free college tuition or the brainwashing ideas that they're fighting for freedom and democracy, but in either case he's a hero for his personal experiences, not for his cause. I'm sorry.