It's about culture, not skin colour. (Nevermind the fact that white people are a minority, for the sake of the discussion.) It doesn't matter whether it be thousands of Africans, Middle Easterners and South Americans or thousands of Swedish woke communists, the issue is that they are a disparate people who will form their own enclaves in which they will refuse to integrate themselves to the rest of the society they're attempting to join. A society that only became so much greater than the shithole they came from because of the values and culture of the people that lived there and built up the country to its greatness. Shifting those key aspects by illegally invading it, showing a blatant disregard for the laws of the land that maintained society, right from the very first second they stepped onto its soil, shows that they have no intent whatsoever of being there to benefit society. They are parasites whose only intent is to steal resources for their own benefit, and whose intent it is to turn their new land into the same kind of unstable, futureless cesspool they abandoned.