It would depend on the issue and it would depend on how invested I was in the job of being a soldier.
If being a soldier was my career and I was in some kind of special unit that was paid a good amount, I would be more likely to follow orders. If it was a random militia shooting and killing people in the name of going against a tyrannical government with very little cause, I would most likely follow my orders.
what a horrible topic...
‘This is not peace, it is an armistice for 20 years.’ (Ferdinand Foch. After the Treaty of Versailles, 1919).
I would shoot a fellow American, only in the case that he/she was trying to kill me, someone I love or care for, or commit violence against an innocent bystander. Ordered to do so? No way in hell.
"God is the name by which I designate all things which cross my path violently and recklessly, all things which alter my plans and intentions, and change the course of my life, for better or for worse."
-C G Jung
I wouldn't shoot anybody unless I needed to... Doesn't matter if they are American or not. I always hate it when a crisis hits and the news says, "Flight 634 went down killing all 322 people, including 8 Americans". Who gives a **** if they are Americans or not? I think that many Americans fail to realize that there are literally millions of Americans out there that are total assholes, lunatics, sociopaths, criminals, rapists, lawyers, murderers, etc.