"If Hindus migrate to other regions on earth, Indian caste would become a world problem." - Dr. B R Ambedkar said this in 1916 [1]. The surprising incident in US was predicted more than a century ago.

For more context, Dr. B R Ambedkar was the main architect of the constitution of India. He also formulated the affirmative action for Dalit representation, called the reservation system. He was one of the so called Dalits who faced extreme caste discrimination in India despite his brilliance and all his achievements. There are documented instances where upper caste government officers refused to touch files that he signed. The discrimination was so bad that he and 500K of his followers converted to Buddhism.

These days, some sections treat him like an ideological revolutionary (sort of like marxism or leninism). Many are openly calling for replacing his ideas with those from manusmriti - an ancient text that is a huge source of racism and misogyny in India. Hope this gives you some insight into the problem.

[1] http://www.columbia.edu/itc/mealac/pritchett/00ambedkar/txt_...