People having self-determinism is the most important feature of having sovereign countries. It's a market of competing ideas. The internet makes it possible for someone in (insert country with less freedom of expression) to see what someone in (insert country with more) has. Making it out as a "some kind of alien" us vs them thing misses the point. People immigrate, and many countries (including my country) let that happen, and they get the benefits of that. It's pretty rare to even hear about the countries that don't allow others to become citizens, although they are pretty major players.