Race is a human creation developed to justify exploitation under capitalism. Racism emerged with capitalism's rise, tied to colonialism and the systematic exploitation of labour, justified by the belief in white superiority
Castles and Kosack
Employers use black people as a reserved army of labour, they are used as a flexible, low paid labour force that capitalism can hire/fire depending on economic needs.
They divide (by using racism) and rule to maintain social and political control
Miles
Radicalised class fractions - the class position of black people is complicated by the fact that they are treated as socially and culturally different, they become victims of racist ideologies which prevents their full social inclusion.
Marx
Alienation:
Capitalism causes alienation of ethnic minorities because capitalism exploits them through low wage labour and social exclusion. Ethnic groups face discrimination, economic inequality and systems which benefit the bourgeoisie and marginalise them