It’s been said by others, but it’s worth reiterating here. Open borders are an impossibility. If you remove one border, two more, smaller, borders will be created in its place. It’s like the titular creatures from Gremlins. Spill water on one, and five more mogwai spawn.
The logic is inescapable. A big border protects a lot of smaller entities within the territory it rings. Abolish the big border, and small borders will organically arise to protect the smaller entities that were once protected as a whole behind one big umbrella border. Abolish the small replacement borders, and still smaller borders will be formed to protect the integrity of the multiplying units of partitioned entities and territories.
For real life examples of this phenomenon in action, see any gated community, school with metal detectors, or bulletproof glass-enclosed 7-Eleven check-out counter. If you remove the national border, the citizens will respond to their unwelcome vulnerability by erecting borders around that to which they can still control entry.
Open borders libertardians like Cheap Chalupas either are too stupid to understand this or, more likely, are too disingenuous to bother understanding. Perhaps for them, ensconced in the swaddle of their own leafy, 95% White, high trust suburban borders, the recursively multiplying, mitotically dividing, expanding universe of atomized borders and supporting Surveillance State machinery necessary in a Diversitopia are a feature instead of a bug. If that’s how they think, then here’s to hoping their cushioned principles are put to the test the best possible way: with swift and unremitting exposure to the reality of the borderless world they champion.