Basically, if they start opening borders the elites in every country lose control over their human farm animals. Standards of living would rise everywhere, almost immediately, as people would have the choice to simply leave and go someplace better. It would undermine and upend the entire capitalist system. Not to mention the impending climate collapse. They cannot confine the disposable and condemn them in places that don’t matter to capital if they are free to move.
You best believe, however, that when, not if, when, the climate collapse reaches its statistical and practical apex of impact, the refugees won’t be ‘outsiders’ anymore. They will be internally displaced people due to climate catastrophe and infrastructure failures. They will be people you know, rather than nameless seas of colorful faces. And when that happens, politicians will dehumanize, criminalize them to the same degree. How do they treat the houseless? It’s coming home, friends. Be kind.