An attempt to explain:
Newcomers do not merely “coexist” alongside you. They form political coalitions. They vote.
Norms, too, compete. There will be rules around queuing, as in England. And as the English are finding out, people either queue or they don’t. You can’t have a situation where the people who queue coexist alongside the people who don’t.
England? Try Japan. Oh boy, you better learn to line up in train cues or escalators. On the right side of the escalator if you aren’t in a hurry. Or left side in another city.