Problem is, although you are morally and ethically correct, you are legally wrong. If anyone is in USA, they get constitutional guarantees, citizen or not: USSC long tme ago.
However, two can play same game. Rights under military tribunal are severely restricted. This also does not just apply to citizens or non citizens, but to all
If you can't get them one way, do it the other way!
Such as?? There are a lot of former and serving military who are very interested in hearing how their rights are severely restricted if they are brought up on charges. Please explain how the freedoms and rights they are fighting to protect don't extend to them.