Identity politics

Historian Arthur Schlesinger Jr. discussed identity politics extensively in his 1991 book The Disuniting of America. Schlesinger, a strong supporter of liberal conceptions of civil rights, argues that a liberal democracy requires a common basis for culture and society to function. Rather than seeing civil society as already fractured along lines of power and powerlessness (according to race, ethnicity, sexuality, etc.), Schlesinger suggests that basing politics on group marginalization is itself what fractures the civil polity, and that identity politics therefore works against creating real opportunities for ending marginalization. Schlesinger believes that "movements for civil rights should aim toward full acceptance and integration of marginalized groups into the mainstream culture, rather than … perpetuating that marginalization through affirmations of difference.

Similarly in the United Kingdom, author Owen Jones argues that identity politics often marginalize the working class.

https://en.wikipedia.org/wiki/Identity_politics#Debates_and_criticism