That's bullsh!t. I don't know much about your sample size, but I can see that it is miniscule. I can quite easily pick out names of Indians in America who aren't Brahmin. If you had researched better, before pulling this off, you would have realised that Brahmins, most of them, can be identified by their names.
Most of them I have known are either Brahmin or the next caste. I have never met a Dalit in the US.
And about all of them are fairly well off when compared with other foreign students.
BTW, i think it is great that other students from other countries can come here to study and have no problems with it, but please don't tell me that Indian students are from all walks of the economic ladder, it's simply not true. Never met a Dalit in the US and i know enough Indians to make this statement.
I've had to report to 3 during my 15 years in chip design.
One got fired, the other got demoted 2 levels and the third no one wants to work for.
All of them treated American workers like they were boot scrapings.