Why Christians worship the pagan sky-god?

According to Stephen Knapp, author of "Proof of Vedic Culture's Global Existence", it was the Vedic king Puru whose descendants were the Puravas, later to be know as the pharaohs of Egypt. Puru ruled over the domain of his father, Yayati, with his elder brothers subject to him. Yayati was deified as Yahweh, who are identified as the Yadavas, some of whom became the Jews of the present day.