>>>Why are there similarities between Hinduism and Judaism or in general Indians and Jews? etc.
Because certain truths are or were universally recognized. I can think of concepts a lot more central to Judaism than walking around going around 7 circles in the Chuppa that are also found in some other religions religions. It makes a lot of sense that those religions would have independently came to do/say the same thing. And it wouldn’t surprise me n the slightest in it was proven that such things were in practice/in writing before Mattan Torah. Do you expect that every mitzvah and concept in the Torah should be something that does NOT resonate with people and something that no one would ever think of their own as being the right thing to do/correct way the world works?