“most of the current occupants of India are described as Dravidian.”
Not quite. The Dravidians are mainly associated with South and South Central India (represented by the 4 southern states). Indians elsewhere in the subcontinent (about 80% of the population) are of Aryan descent. Then, there are communities of Aryan descent in South India too (and these folks are often the targets of discrimination by the darker-hued “Dravidians”).
The big question now is: Is he now, or has he ever been, a Muslim? (: