That’s his training. The military mentally conditions these men to respond to stuff like this in this way: absolute, unyielding, expected. He is not going to be able to conceive of a different way because his training was that thorough. That’s probably a good thing. My dad was in the military also and when you ask him about military stuff, his personality goes into soldier mode like this too.
However I will say, having met modern young men who are soldiers - idk that they got the same training at all.
I also think there will be a civil war. I think Trump is a Russian asset meant to cause it and do as much damage as possible to the US. And the same Russian propaganda that turned MAGA into a weapon has been affecting soldiers too.