That's might have been true of the more "enlightened" Indian engineers who immigrated to Silicon Valley in the 80s and 90s. There were also ambitious Indians who liked the old ways but lacked the opportunity to engage in such discrimination until they adapted or the opportunity eventually arose.
Either way, as more and more of a certain ethnicity/race enter a country for the purposes of bettering their financial prospects, many of these immigrants reinvent the social dynamics of their origin country. This is how enclaves are created. And while many of the "enlightened" Indians have left behind explicit caste discrimination, they didn't leave other practices behind either ( e.g. parental authoritarianism, arranged marriages, etc.).
A different geography doesn't necessarily produce a different worldview. Every immigrant arrives with his own family values, religious dogmas (or lack thereof), and modes of thought that lead to these aforementioned conflicts.
> Caste has no place in America. It's antithetical to our founding values
If we're excluding slavery as a de facto caste system, then sure. However certain behaviors being antithetical to our founding values doesn't make them easily solvable problems.