It's a tough one. We are strict on our treatment of prisoners. OTOH, not much damage was done. IF *** BIG IF *** the SEALs acted inappropriately, then you'd think a Captain's Mast would be in order, not a full court martial.
But then we don't know the whole story. Perhaps it started as a Captain's Mast, but the SEALs refused because they know the prisoner is lying, and refusal usually elevates an issue to court martial. Now they get to show their innocence in the court martial.
They are not required to prove their innocence, numbskull. It's the prosecution's job to show why this terrorist animal puke should be believed beyond a reasonable doubt.
And they shouldn't have been charged criminally--or even at captain's mast--in any event. Even if the charges were true, an oral counseling would have been more than sufficient.