Decades ago, the US bourgeoisie initiated a long-term conspiracy to "attract" the "best talent" from all over the world, in order to suppress wages.
As a bonus, they could claim to be "multicultural" and tolerant. As a second bonus, they got an additional vector for their culture wars, to distract their population from class war.
There is not enough weed in this world to appreciate how successful this strategy has been. Literally 100% of all anti-immigrant AND pro-immigrant sentiment derives directly and entirely from this conspiracy.