We do not swear an oath to follow His orders unconditionally. Do re-read the oaths.
I swore an oath to defend the Constitution of the United States.
But you don't do either. You are determined to defend, not the Constitution or the President, but to defend your delusional opinion of what you think you swore to, not how the law would actually hold you accountable acting out on those opinions. This is why you missed LR's point on the nature of reality. You don't live in it.
When you swore to defend the Constitution you swore to follow the orders you were given. If you, in good conscious think those orders violate the Constitution it could be that you are right but you might still wind up executed for treason anyway. The military can't work too well if folk determine for themselves what orders they will or will not obey.
The Commander in Chief is the duly appointed official the Constitution says calls the shots for the military. And even though you are vastly wiser and more educated than Obama and superior to him in every other way as well, as a military person, he gets to tell you what to do.
You probably just have to large an ego to be psychologically suited to serve in the military.