[doombolt]

> It's about the interests of this or that group (e.g. given population vs people coming from outside). Arguments can be made for either, but if a given population is not protected, then those coming from outside wont be protected (from people coming from outside later on) either.

> People build cities to be protected and prosper long time in them, not to give opportunities to third parties to come and displace them from the places they've built and helped grow.

Well you're basically repeating Donald Trump's words when he explains why he wants to build a wall, and last time I have checked nobody calls him progressive.

Just do s/cities/countries/ and you're all set.