I know that you wouldn't but WHY would you not? He is of Norse ancestry; he hears the call of the Norse gods. Would it be his appearance that would be off-putting? Would a person be more acceptable if half-Norwegian, half-some-European-group? How would you even know? How would you know if someone was of French, English, Italian, or some other ancestry? You wouldn't.Secondly, if this half-black Norwegian knew anything about folkish heathenism, he would stay away from my group anyway, knowing full well we would not accept him in.
Friend of mine looks like a poster boy for viking recruitment. Tall, long flowing blonde hair, blue eyes, pale skin, built like a brick wall. He is about 1/8 black, and also has some Native American blood. Say, he comes to you, says he wants to find out about Odinism, doesn't mention his non-white ancestry. Do you ask for a family tree? Ask if there is any non-northern-european ancestry? I don't understand how you go about this.
Of course, there's a lot of "what ifs". You say you want to stick with your own kind - how do you define your own kind? You want to help your own race. Does the human race count as your race? Do you help those that are not of your race, if they are in need but those of your own race are not in need? Do all Europeans fall under your race, or just those of far norther European? Do the Baltic peoples? Finns? Russians? Polish? If you're going to use a term like "race", you need to define it, explain the parameters.