Im interested in this link between hinduism and European native beliefs. A quick google search didn't lead to anything authoritative. Do you know where more info could be found?

In theory Hinduism, Zoroastrianism, and the ancient Greek, Roman, Germanic, Celtic, Norse, etc, religions, are all descended from https://en.wikipedia.org/wiki/Proto-Indo-European_religion - however, that is so long ago, by the time we get to the historical period, they have diverged a lot, both due to their own organic development in different directions, and also due to the influence of differing non-Indo-European cultures - such as Dravidian culture in the case of Hinduism; Semitic and Sumerian cultures in the case of Zoroastrianism; Etruscan culture in the case of the Romans