The ideology that is propelling this insanity of wokeness/cancel culture/"marginalized groups" is critical theory, which is a Neo-Marxist theory. It basically takes Marx's theory of labor relations (between employers and workers or labor and capital) and interposes it only various identity groups. Its interposing Marxist economic theory with an uneven power balance between workers and their bosses onto identity groups, so everyone is either oppressed or oppressor based on their sex/race/ethnicity. I'd say the best term for it is Neo-Marxism.