You know dragging Rajiv Malhotra, Koenraad Elst, and for all I know Subramanian Swamy into this thread is not going to lead to a constructive debate. This is not the JNU tea room here where you're upsetting the applecart or something.
I'm not calling you a fascist. Elst may have genuine points about the aggressiveness of Abrahamic religions, this doesn't make it OK to make this point over the bodies of Muslims today who had nothing to do with Somnath, etc. But that's what people use him for.
Just because someone lives within the boundaries of India doesn't give you the right to dictate anything to them outside the bounds of the Indian Constitution, something Malhotra (tell me, does he have _any_ formal training in historiography?) would do well to remember.
So maybe there was an Aryan migration or the IVC merged with them somehow. Do you really think that everyone who might hold the Aryan invasion hypothesis automatically thinks Indians are bovine Hindu Dravidian stock who never stand up for themselves? Try telling that to the Jaipuris or the Marathas for starters (very Dravidian, those two). This is all the worst kind of caricaturing you are engaged in.
