The so-called Aryan-Dravidian racial theory is not controversial because of "Hindutva." It is controversial because it has been used to divide people into North South and justify colonization.
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All due to falsely correlating the Sanskrit term Aryan with race since Christian colonizers were race-obsessed.
The only conclusion from DNA studies—Indian DNA is totally mixed, blowing any "race purity" theory of "caste".