Worldview and religious differences also lead to disagreements about fundamental values. And among other concrete examples that I personally think are important: how much respect should be given to religious/spiritual/supernatural beliefs, what rights are inalienable human rights, how people with various illnesses should be treated, how resources are distributed, what behaviour is acceptable during disagreements (on large scales and small) and what subjects/ideas/beliefs/actions are taboo seem like the big ones.
Some other cultures got there mostly.
When these cultures meet and interact, the former just become stronger in their misgivings.
https://www.txbiomed.org/news-press/news-releases/inuit-diab...
Yes, the remarkable aspect of this whole debate is how easy it is to feel superior to both sides ( https://xkcd.com/774/ ).
I don't think you went back far enough, keep going and you are likely to find your Eastern European ancestry migrated out of Africa.
https://www.scientificamerican.com/article/is-the-out-of-afr...
Africa -> ... -> Europe
Africa is still where it started.
If we're going to speak meaningfully about where Europeans come from, we need to include wherever they picked up Neanderthal DNA (hint: not in Africa; no African population has it).
I think that the racial discourse is not just unfair and smelly, but also unfruitful. You ought to really look at culture. This won't help the right with the left, of course, because they hate to admit cultural differencies either.