[@Andreyich]

Showing that, he is going to get killed shortly with that attitude - via his overconfidence against a xeno, failure to cooperate with his fellow Guardsmen, or BLAMed for breaking Imperial Protocol and Code of Conduct, also threatening a superior officer.

I even asked, if a religious angle would work on him. If John is going to play the ass without any angle to approach him - then like RL asses he will be ignored and left in the ditch.