Let me tell you something, I don't go around seeing some brown person and think "foreigner", I think "fellow human in Denmark".
If they give me just any small inclination that they identify as danish, then I will view them as danish.
If on the other hand they speak a ghetto-arabic language with each other and they dress in ways that no or few danes do and if they behave in a threathening manner and if by their behaviour they make it very clear they are in opposition to what I consider Denmark, then I'll take them on it and consider them as foreign.
There's absolutely no inbreeding in Denmark. We're one of the most outbred countries in the world. We stopped marrying cousins 600 years ago.
Turkey on the other hand.