The treatment of Dalit people remains an abysmal disaster. They are treated as subhumans. The vast majority of the rape you hear about in rural India is done to Dalit (untouchable) women.
This is an unspoken truth but caste discrimination is rife in first generation Indian diasporas. Absolutely rife.
The one benefit of the caste system is that Dalits are very prone to convert to other religions to escape their caste position. Ambedkar's Dalit movement (to convert Dalits to Buddhism) rocked India with half a million conversions in 1956. Hindus live in fear that Dalits may convert to Islam above all.
It's not even a brown thing, some of the nicest people I've met were from Nepal and I thought they were straight up Indian, Pakistanis are alright, I've met a few folks from Banglasdesh, they were decent. Sanjeets however....indians.....