       How many times do I have to mention that Afghan areas are mentioned in Chapter 1 of VendidAd.Read my above points very properly. Regarding Indian genes ( which is wrong point in today's situation but you are holding age old & discarded point string ) , read Oppenheimer's report which is also mentioned in this discussion. Remembering Rishi Agatsya as creator Tamil language by Tamils is myth ? Then, why so called Aryans are not remembering central asian homeland  when their very own person is remembered by Tamils as their language developer. Even though this is remembered tradition but it is very ancient than advent of AIT. As per your points, south Indians must be silly to adopt Aryan culture,religion,very prominent naming of people etc.   And, Indian subcontinents population today is around 1.5 Billion where as Kazakhistan ( of Andronovo ) or full central asian's population is hardly 5-7 % of Indian subcontinent. India is always being source of knowledge for her neighbours country during historical period. So, these nomadic Aryans giving knowledge to already advanced & civilized Indians in the past is utter non-sense. Even, BBC has debunked AIT. Read below notes. Then, your age-old asertions has got no meaning or weightage.   