Identity politics is a political approach wherein people of a particular gender, religion, race, social background, class or other identifying factor develop political agendas based around one or more of these categories.
Contemporary applications of identity politics describe people of specific race, ethnicity, sex, gender identity, sexual orientation, age, economic class, disability status, education, religion, language, profession, political party, veteran status, and geographic location. These identity labels are not mutually exclusive but are in many cases compounded into one when describing hyper-specific groups, a concept known as intersectionality. An example is that of African-American, homosexual, demi-boys with body integrity dysphoria, who constitute a particular hyper-specific identity class.
Read more here: Identity politics – Wikipedia
The Frankfurt School and Critical Theory – Cultural Marxism