'It has now been discarded by most american universities and removed from syllabus for lack of evidence.' This is an incredible claim! In fact a simple lie..(There were some attempts to smuggle in 'indigenous Aryan' theory by some misguided upper class indians. But the attempt failed).
Americans, their universities, where this area of history is taought, go by the prevalent, more likely theory of Aryan invasion.Americans are least bothered whether Aryans invaded India or not.
But it seems it matters to some Indians, who feel they are less Indians unless they prove their weird theory of indigenous Aryan.
One does not have to be Aryan to be Indian. Vast majority of Indians do not claim to be Aryans How should it matter to them, whether Aryans came from outside or not?
All products creativity in arts and sciences in India belong to Indians, not to Aryans. Hindus are not Aryans, but proud indigenous Indians.