Caste systems, like any other form of discrimination based on anything but the"content of [the person's] character", are despicable and deserve condemnation.

I do not know much about the history and culture of India, except for basic events we learn in college and as cross references in historical and cultural research, so I do not know the details of how these castes are formed or determined; I ignore if there are racial features that make it impossible for a given person to lie about their caste, but I think that the fact that India is a predominantly religious nation (despite it being a secular State and having freedom of religion as a constitutional right) makes it more problematic for any anti discrimination law to be enforced and for people to just ignore the arbitrariness of caste distinctions.

As Christopher Hitchens put it, "religious poisons everything", more so when it is practiced in an overpopulated region where every sect or church has the alleged right to give free reign to their convinctions.

PS. I think you should seriously consider sending Subham money for a new mic/headphone. It's really hard to hear him. :)