As a career soldier, I got no sympathy for a deserter and one that did it during wartime deserves no slack: he was guilty and got what he deserved by the UCMJ. If Ike had a buy into that decision, and approved it: then it was solid as his decision to go on and invade Normandy.
Drop the Atomic Bomb: never met a WWII vet that regretted that decision .
I have a great respect for human life and hate to see it taken away or wasted. This soldier made a decision and knew the consequences just like a criminal knows the consequences and conducts a crime.
This soldier had a choice and made the wrong one. He is solely responsible for losing his life. There is no honor due him nor remorse for taking his life merited.
Cowardice, Desertion, Traitors : No Slack in my book: Prosecute and let the Uniform Code of Military Justice sort out the facts and render a verdict.