Indian immigrant to US here (non IIT, but Brahmin). Although I personally haven't seen or noticed casteism in the Indian community here or back in India for that matter. Although there were just a few idiots ... but it could very well have been my brahmin privilege or perhaps my urban upbringing. I did notice a bit of persecution complex within Brahmins about "reservations" (India's affirmative action). But more alarmingly, nowadays anti-Muslim feelings are widespread and it's distressing to see that even in my immediate family.

To my fellow Indian-Americans : we need to be adults and stop being so defensive about anything critical about our community. While we can be justifiably be proud of our community's success, but also need to be aware that we are also eminently capable of folly, and alert to some of the disturbing undercurrents in our community. I feel we absolutely need to take these charges seriously, just as we would sexism or racism in America.