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]
[1] https://www.hup.harvard.edu/books/9780674987883 [2] https://en.wikipedia.org/wiki/Caste_system_in_India