Actually, I know quite a bit. Between a good deal of studying as well as living and working in bush Alaskan communities most of my life; I'm pretty sure I know a thing or two. 

Senilicide was a commonplace practice in Eskimo communities prior to the appearance of European cultures. Good, bad or indifferent; it's just a fact. Native communities throughout Alaska commonly raided one another prior to the appearance of Europeans to take women from other gene pools (or so elders I've spoken to in Barrow, Nuiqsuit, and Kaktovik have told me in stories), which in this day and age is called kidnapping and rape. Once again, good, bad, indifferent; I don't care, it's just a fact. White royalty incestuous? How about EVERY royal house on the planet; not just white folks. So your point? Warrior culture? Sorry, Aztec=warrior culture, Eskimo=hunter gatherers (very good ones actually). There is a broad difference in anthropological terms. 

My points are, don't make things up. Accept what was real.