A few years ago I couldn't imagine Brexit becoming a reality or someone invading... well, let's leave it at that.
Scottish Labour already has a committed anti-independence position, so they likely will let the SNP win over doing a similar promise. The only other possibility is a coalition government with Labour, but I don't see any government making the same mistake after 2016.
For some reason I find British politics very interesting although never having set foot onto British soil.
Of course, no one ever tells you to shoot "that nice fellow countryman over there". Soldiers are told dangerous (though unarmed) anarchists/bourgeoisie/terrorists need to be stopped. And the vast majority of cases end up with a lot of dead civilians.
I am not judging, I would likely be the same if I were a soldier in that situation. The fact it happens so often shows it isn't down to individual soldiers lacking some moral or ethical quality. It's human nature. It's why armies work. I just think everyone have a (very dangerous, baseless) belief that "that could never happen here "...
You've only been able to list 1 example in Norway/Sweden. I gave 3 off of the top of my head across a range of times, countries, cultures etc.
You can "believe" what you want. But the facts are against you here I'm afraid...