Well, that Noregsgard... When is it from? All these other songs are from "nasjonalromantikken" anyway, so if Noregsgard is, to... Well, back then the norwegians had just left Denmark, and was under Sweden, and the ppl (the nor. ppl) wanted everything to be real nor. They longed for that time before 1350, and Noregsveldet. The great nor. kings, the vikings and such. Those kings were not nobles; they were not of "blue blood". The ones who ruled Norway were, though. Both the swe. nobles and the dan. nobles. (There never were any realnobles in Nor.) That way, bluemen might mean everything/everyone that/who is not pure nor.! -Maybe. But back then, there were no nazis, so if the lyrics in Noregsgard is the originals, then it have to mean smth else.
But what Fenriz thinks of different things, is smth else. It doesn't necessarily have anything to do with choosing just these song - after all, there's lots of ppl who love these song, who are nowhere near being nazis, or even racists.