would you stand up to your peers if they took immoral (and unconstitutional) actions? Keep in mind that (the officers anyway) take an oath to protect, preserve, and defend the constitution?
The constitution doesn't necessarily apply to members of the Military in it's entirety. They abide by the UCMJ or Uniform Code of Military Justice. Yes, all members are sworn to uphold and protect the US constitution and POTUS.
As to your personal question; I would stand against any unlawful actions taken against a detainee, and anything requiring unnecessary personal harm or danger. I don't like treating anyone inhumanely.