Not sure the zoo analogy holds up as people of different cultures are not inherently enemies. But I'm sure the native Americans have some different ideas on migration to you. It can be a matter of perspective. Working to reduce the reasons for mass migration may be more productive than just putting up walls. If the climate continues to change (for whatever reasons) it could get a lot worse.
I grew up in a multicultural environment with West Indians, Indians, Pakistanis, Italians, Poles and white 'British' kids were a minority at my schools. It was not such a problem. The problems can be more with people who try to create division and who fear difference.
The divisive people can come from any of the cultures, but they are usually a minority. Everyone else just wants to get on with living their life.
I have seen divisive elements on Hive who may talk about 'the Koreans' or 'the Malaysians'. I don't thinking lumping people like that is always valid (as with most generalisations).
Balance can be a matter of opinion. Maybe we should work more on finding common ground.
!ENGAGE 50
Wishful thinking is not sound public policy.