the guy was a deserter, he left his unit to side with the enemy. He is not entitled to anything more than a court marshall.
It isn't up to you. American fighting men and women and the nation are dedicated and sworn to do the best to our abilities to leave no man or woman behind in enemy hands. There are no exceptions. People with a narrow political agenda don't have the right to change that unless the earn it. You want to change the no man left behind doctrine, go change in, otherwise and until you get it changed, you are being an anti military/anti American.