Something should happen. Especially if the minority becomes a majority, or something close.
How historical is it when half the world migrates to Uruguay? Or when I make Haiti a great power with several other great powers as satellites.
I think the goal should be to be able to identify the pertinent facts of the situation, provide tools to respond, and respond with logical outcomes.
During the course of play the world becomes significantly distorted. Either there can be an attempt to mitigate (prevent) those distortions or they should be acknowledged.
More fundamentally the distinction between performance and rights of minorities is not uniform. It isn't a problem in the US. In fact minorities may out perform long time residents.
This is more a phenomena of Europe and the East. I've lived in all three areas. Europe is tribal in outlook, disguised as nationalism. Even up until recently citizenship was a matter of ancestry. In the US it is explicitly, as part of the constitution and in practice, a right of birth and a legal procedure. By the second generation, or sometimes faster, few in the family can remember the 'native' language. Call us 'Borg' nation. Europe and Asia practice exclusion. The way the pops expand reinforces this and the idea of inherited position.
In Africa minorities vastly outperform the resident cultures often to the point where they are resented and expelled. To the gain of North America. Indian merchants in Uganda would be an example.
While we're on the subject, the Vicky assimilation process includes a change of religion. This almost never happens in real history or contemporary practice. In fact the introduction of a new religion in a culture is more likely to gain converts from the existing population. Especially if it is human centric and has a strong organizational evangelism behind it.
Culture, Religion and 'Race' have to be distinct. People will change their culture, they will rarely change their religion and they can't change their 'Race'.
It's hard to say what should be done. Performance, acceptance and militancy are not always linked.
An area worthy of some discussion.
