This is an elaboration by Tony Joseph of one of his earlier articles.
Clearly the archaeological theories (of Romila Thapar, and Wendy Doniger) and linguistic theories of Michael Wiesel and many others are finding absolute proof in DNA data, as DNA technology gets clearer by the year. [I've elaborated and commented on these theories extensively on this blog elsewhere]
So, yes, there was a spurt of migration from Central Asia (via Afghanistan) into India around 4000 years ago.
This confirms my view that Zend Avesta was written first - prior to the Vedas. The Vedas COPIED its key arguments and "gods".
Talageri is wrong. Sanjay Sonwani is right. He shows clearly how the rivers of Afghanistan are the ones cited in the Vedas.
Btw, my ancestors were Vedic Hindu and residents of Afghanistan. It is IMPOSSIBLE for Vedic Hinduism to have reached Afghanistan from the "cow belt" of India in those ancient times. This also proves that Vedic Hinduism was ORIGINAL to Afghanistan.
Finally, the facial features of my grandfather and uncles and aunties from my father's side are closer to European/ Middle Eastern - not the typical Indian features. Now that I know they migrated from Afghanistan - and were pushed into India by the Partition, this makes further sense.