Systematic mistreatment of people based on their social identity is called

Depends on the social identity of a group of people, for example

Racial identity: Racisim Gender identity: Sexism, transphobia Sexual identity: homophobia Jewish identity: Anti-Semitism Muslim identity: Islamaphobia Class identity: classism

Explanation:

Systematic mistreatment of people based on their social identity refers to how people receive a differential negative treatment because of who they are and how they identify themselves. It is systematic because depends on the social structure, and the way society values an identity category and the position of an individual within that structure; and it is enforced by the institutions of a particular society.

The word used for the kind of systematic mistreatment depends on the different identity categories a person belongs to or identifies with. For example:

Racial identity: Racisim Gender identity: Sexism, transphobia Sexual identity: homophobia Jewish identity: Anti-Semitism Muslim identity: Islamaphobia Class identity: classism