You can see the same effect in the Indian diaspora in America as well. I'm having trouble finding stats on this, but by and large it's also highly educated, from the upper crust of society in India, overwhelmingly Brahmin and many groups (eg. Gujaratis) are statistically overrepresented compared to the Indian population at large.
https://timesofindia.indiatimes.com/nri/us-canada-news/gujar...
My friend is Brahmin but non practicing. For her it's just something she is proud of and a lot of upper caste Indians end up going to the US for school because they didn't get into IIT. There are big differences between the older and younger generations but I wonder if maybe the immigrants from India come here with kind of their own distinct culture where caste is a part of identity so not having that caste makes you an outsider here. idk =/
1. I don't mean to lean into any negative connotations of the term, quite the contrary: https://en.wikipedia.org/wiki/Cosmopolitanism