Capitalism places more value on wealth and removes value from experience, ultimately creating a capitalist echo chamber that favours those already in power, who are by nature white because they were the original inhabitants of wealthy lands, essentially making white people value wealth and prosperity and luxury more than the human experience, whereas most other cultures and peoples are more in tune with the human experience, although some, of course, are also tainted in equally terrible capitalist, materialist (in the wrong way) mindsets through influence from the West, among other reasons of course.
Their capitalist wealth allowed them to propel their culture and worldview into the world more than the world could permeate American culture, or at least not much more than for monetary gains, like restaurants and ethnic cuisine, among other capitalisations of ethnic cultures and cultures outside America. This means capitalist Western culture normalised itself into becoming the de facto culture that is perceived as most effective, efficient, and desirable on most levels.
Therefore, when other cultures are brought into the US, there are ignorant associations, pseudo-intellectual hatred based on internalised fears, and bigotry based on their normalised world-view, one that describes the world for them, even though in truth it only actually, based on evidences, describes the American experience, painting the rest of the world into it. Therefore, when other cultures and people of different ethnicities break into the USA, they are fought with means of euphemisms, bigotry, ignorance, and reactionaries, as well as old-standing Republicans.