I've actually been to South Africa and have witnessed that many natural born black South Africans treat black immigrants to their country horrifically.
Link: https://www.washingtontimes.com/news/2019/aug/25/africa-illegal-immigration-meets-border-crackdowns/
just be welcomed at all US airports with compassion. They should be put up in hotels, fed, and given healthcare. Someone explain the difference between arriving on an airplane or walking across the border. Why have customs at US airports?