caste system in india is an evil that persists even today, and is a complex topic.
majority of the indian-origin users on hackernews or people in the IT community are very likely upper castes. see [1]
If you are interested to learn more about the caste system in india it is recommended to get your facts from multiple sources. start from [2]
Unfortunately, India's poorest still don't get govt benefits due for them: A few gobble up all the caste-based reservation from the govt. I have seen many people who have made a career out of talking about caste all the time.
I know more than 3 people in the US, who talk about caste all the time (as in that's their job now) but grew up in very privileged families.
Many Indians who talk about caste all the time, do it in ways that aren't immediately obvious. "What part of India are you from?" and "What's your surname?" are not just innocent questions.
[1] https://www.hup.harvard.edu/books/9780674987883 [2] https://en.wikipedia.org/wiki/Caste_system_in_India