Hmmm....do military doctor's take a different oath? Is his only duty to treat wounded in Afghanistan? That's a pretty narrow scope of duty for someone with such a lengthy career. Or is treating wounded only one aspect of his sworn duty?
That duty was inherent in the position he was was ordered to fill in the 1st Squadron, 33d Cavalry, then deploying to Afghanistan. His message was: “Do my job? No, I’ll become a political martyr so that clueless twits will call me hero.” Some of us know better, and if you had been paying attention, so would you.