My Question to folkish Heathens

Folkism has been a huge topic lately, many being Folkist, others strongly disagreeing with those who are, and many not understanding exactly what it means, and it seems that is because just exactly what being folkish is, regardless of what others say, varies from person to person. So I am curious, what are your views on Folkist Heathens? Does it work? Why, or why not? As a Biological Anthropologist, as I have said many times my views on Asatru, and the Human Race differ from many other Heathens, so I am specifically curious as to how Folkish heathens view those of mixed heritage? If you're supposed to go to your ancestors, and your history first, how do you choose which one? The one with the largest percentage of your DNA? (Which most Folkish Heathens in my personal experience stay away from DNA tests) or the one your skin color best reflects? How does this work?