Why are Indians allowed to just "abandoned ship"?

Imagine white people utterly decimating their countries. Imagine white people shitting in the streets and piling up trash everywhere.
Then they all collectively start moving to China as soon as they make money, and they start to explain to the Chinese where the greatness of China comes from.
Obviously, these would be destructive and conniving oligarchs that have to be suppressed, you can't allow people to do that.