Ariya is a person striving for perfection.
In modern times, history has been rewritten countless times to suit certain political agendas.
About the Tripolye culture. Artifacts similar to those excavated by V. Khvoika near the village of Tripolye, but dating back to the 6th-5th millennium BC, were found in the territory of present-day Romania, Hungary, and Serbia... And there, this is known as the Cucuteni culture. And in China, they once excavated the remains of the Yangshao culture, dating back to the 6th millennium BC. The patterns on the pottery belonging to this culture are completely identical to those of the Tripolye culture. And whether the Tripolye people actually belonged to the Indo-Europeans or the "Euro-Chinese" is an open question.
About DNA genealogy. There is nothing surprising about the coincidence of haplogroups and similar things among different peoples. I can easily prove that ALL of humanity originated from the same ancestors, using elementary (well, almost) mathematics.
In 1920, archaeologists made a scientific discovery, discovering two ancient cities - Harappa and Mohenjo-daro.
Well, I wouldn't take the Mahabharata seriously. There is a wonderful work on this topic - the trilogy "Black Balaur" by G. L. Oldie.