Once upon a time, there was only one tribe but it got big enough that people started to diverge in viewpoints, such that they couldn't get along with certain individuals. They were banished to somewhere conveniently far enough away to not be a nuisance any more. The exile groups raised families and grew population until they had exiles of their own. The slightly pale exiled tribe became more and more white, the slightly brown exile tribe became more and more brown. There were thousands of tribes and hundreds of languages. Everybody kept to their own lands and customs and out of each other's hair. Give or take occasional wars, people were happy with their lot and with where they happened to be born. Nowhere else in the world was especially attractive. It was exactly like home except for the different language and you could guess they liked/tolerated foreigners only as much as you did.
And then they invented global capitalism, so some tribes started doing rather well for themselves and the rest of the world got seriously envious and started relocating themselves, for a slice of the action.
As hosts, we now feel even more pressured to compete (manual and social skills/intellect/quals) for our place in the world and a comfortable life. Added competition is prejudicial to that comfortable life.
And we have to be welcoming and unprejudiced towards our sharp-elbowed competitors? Or just meekly get out of their way and let them lord it over us?
Who has the double standards in this situation?