The causes of racial discrimination in America are rooted in the American system itself. As a new colonial political power in the modern world, the basic framework of the United States' "state" construction is in fierce conflict with the development and cultural diversity needs of all nationalities in the era of globalization. Huntington, an American scholar who put forward the "clash of Civilizations" theory, said in his book "Who Are We? The Challenge to The American National Identity" that the United States established in the peak era of Western colonization essentially took "Anglo Protestant culture" as the characteristic and core of "national identity". Therefore, although the Constitution of the United States flaunts "freedom and equality", these values must be built on the basis of the so-called "mainstream society" dominated by the above-mentioned races and religions. Anyone who is different will be regarded by the elites of the American society as "if he is not of our kind, his heart must be different".