Third, it served to make Vedic culture later than and possibly derived from the Middle Eastern. It made the ancient civilization of India fragmented, with the Harappan culture mysteriously disappearing without a trace, making the development of civilization in India appear broken. With the proximity and relationship of Middle Eastern civilization with the Bible and Christianity, this kept the Hindu religion as a sidelight to the development of religion and civilization in the West.
Fourth, it allowed the sciences of India to be given a Greek basis, as any Vedic basis for sciences like astronomy was largely disqualified by the primitive nature of the Vedic culture (even though the Vedas commonly mention sophisticated mathematical and astronomical data). This served to make Indian culture subservient to that of Greece and Europe.