@thor
The trick is that you need to understand that "white", "black" etc. are no longer descriptions of skin color. They are ideological labels. There's a reason you see usages of capitalized White or Black.
White is everything the religion deems is White. If the religion finds use in labeling the Sámi as an oppressed people, to use them in a fight against the Norwegian majority, then the Sámi basically become ideologically Black, while the Norwegians are White.