People from lower castes care because they face discrimination, obviously.

People from higher castes, even if they're open-minded on the topic of caste, likely have relatives who aren't -- especially if they're the only member of a large family who has left India. Children have been disowned or even murdered by their relatives for marrying a member of a lower caste; it's really hard to escape that sort of prejudice.

I don't care about caste, and I haven't met anyone who does for the decade I've lived in the US. It doesn't mean there aren't any Indians in the US that care about it; there surely must be given that such Indians existed back in India. I'm just making it clear that it's not 100% of Indians in the US that care about caste, as your question seems to imply.

I'm Indian, live in the US (Midwest, south, outside big cities) and I'm happy to just meet another fellow Indian lol. Couldn't care less about caste or language or whatever.

We are already so far away from home, atleast we can look out for each other.

I'm not in tech so I've never lived anywhere with many Indians. I'm guessing these types of issues start to crop up when you have higher chances of meeting many people in your exact social group back in India and end up forming cliques.

I don't and no one I know does. I'm happy to leave all that crap behind. Apparently some people would rather drag those issues along with them into a new country that was previously free of this particular scourge :/

To be fair - I think James Baldwin explained it so it's not just Indians. For a lot of folks, you feel some sense of security about your place in the world when you know there's someone "lower" than you.