Individually? It’s not. When you’re talking about doubling, or more, the population over the course of 20 years it becomes a problem. That person should also accept that they aren’t a part of the community in the way that someone from there is and they need to accept being treated differently by people until they assimilate which might take a few years, a few decades or a few generations.

I’m not even saying they need to be forced out. Just don’t expect people to like their community changing or be nice and accepting of the people doing the changing. I would be down with anyone trying to force that acceptance being forced out.