Well, if anyone from India landed there and were responsible for Amerindian art, why does the theory fail on three counts?
1. Why are they genetically so different from us?
2. Why did they totally abandon their most fundamental trait, Language? The Amerindian languages bear no resemblance to either Indo-Aryan or Dravidian language groups. Why is it so?
3. Why did they abandon their religion? Why is it that an entirely new pantheon of Gods was adopted, bearing no resemblance to Indic Gods?
I doubt given the research already done in these areas that any proof that radically alters the present views will present itself.
@
SarthakGanguly for your consideration