Only because you naïvely believe in fair trials.
The profound irony here is that Hasan, in essentially prosecuting himself for treason, is acting as his victims’ and the victims’ families best friend by proving he waged war against the United States and the victims were killed and injured by enemy action in that war. Those are the necessary elements in establishing a claim for a Purple Heart. The Regime, being the bitter hater of America and Americans that it is, understandably wants to keep Hasan’s victims from receiving the Purple Hearts they earned.