Over the years, I see a bigger gap between politics and philosophy. It ususally depends on the person. When someone is talking philosophy they are usually looking for meaning or trying to create a positive meaning for themselves that they wish to share. When people talk about politics, they are usually just want to be in charge of what people do and the politivs they pick to represent are just a result of their experience. I say this seemingly pointless idea in relation to music, because I notice the same things with bands.
But in Darkthrone's case I will add that bands who use politcs solely for shock value, strangely enough end up being better than the bands who seriously believe in their political dogma.
Maybe I missed your point, and if I did, please explain it to me, but I see no connection between philosophy and politics, other than a made up one.