Do you read Classical Greek? Have you read Gladstone's book? In my case the answer to both is yes. And, with a Hindu Indian parent and much time spent there through my life I am quite aware of the ancient cultural ties between those two cultures.

There is plenty of work in cultural anthropology, biology, and casting that people are incredibly alike in most ways even in regards to things that appear to be learned, and yet also have elements that are strongly dissimilar despite seemingly being innate. What about people with innate absolute orientation and no concept of right/left. That's not a "historical" phenomenon but a contemporary one.

Sometimes things can be scientific and not ideological you know.

Why was an oxe the color of wine?