This opinion isn't uncommon in Chinese and Chinese diaspora communities throughout East/Southeast Asia. In Malaysia, where Chiang is from, Indians are the next largest ethnic minority group after Chinese, but don't hold nearly the economic power that the Chinese community does, though there's definitely an Indian elite/professional class. Usually this comes with a dollop of Han-centricism (the only cultures which matter are touched culturally or politically by the various dynasties of the Middle Kingdom [minus the non-Han ones, save when they Hanified]).

Not excusing it, just saying that it's consistent with where he's from, as well as really disappointing if that's an indication of his beliefs rather than something put on for a joke.