He didnt have a right to due process as he was a combatant, not a criminal.
Every American citizen has a right to due process, regardless of whether some hack politician labels him a "combatant."
In criminal matters, that's absolutely correct.
In matters of war and acts of war, what you just said is not nearly so accurate.
And the question is always "what process is due?"
In the latter case, the process is not what some people seem to believe it is or "has to be."
Here's the twist, we need to distinguish between Someone being labeled a Combatant, Anyone, and the Evidence that supports it.