Agreed. Any one who has made it through basic and is in a deployed unit understands the brotherhodd between the soldiers, regardless of race/creed/color. Sure, there are those who never get it, but they are spotted quickly and hopefully weeded out. My son's guard unit had a Muslim soldier who was okay with the USA, but for some reason had a burr up his *ss about India and was outspoken about wanting to kill Indians. Needless to say, he was discharged.
We had plenty of known gays male and female that were just as much part of our unit as anyone. When your overseas and far from the USA, your sexual preference is pretty low on the priority list.
I would guess that the Muslim in your son’s unit was Pakistani. My guess is that Chen was too fresh out of boot camp and had not assimilated into military life.