the author of original article is insene to think of mass conversion or migration.. how they will convert? Hindu can only be by birth, so will they convert to buddism??)
That is nonsense. Anyone can become a "Hindu" - this is not Judaism where your mother has to be a Jew. How else do you explain all the "Hare Krishna's" in the US? Have you read any "Hindu" text that says you cannot convert to "Hinduism"? And anyway, what is "insene"? What dictionary are you using?