Resonance with collectivisim is the determining factor on a liberal versus progressive scale,
Definition of COLLECTIVISM
a political or economic theory advocating collective control especially over production and distribution; also : a system marked by such control; emphasis on collective rather than individual action or identity… See the full definition
1: a political or economic theory advocating collective control especially over production and distribution
also : a system marked by such control
2: emphasis on collective rather than individual action or identity
You're using the term incorrectly. Talking about race, gender, etc. is focusing on individual identities and common experiences they have. Ignoring factors contributing to our identities would be collectivism.
Also, earlier, you referred to The Thriller as an identitarian. You messed up that word too. The Thriller doesn't match any of the definitions
ADJECTIVE
1. concerned with promoting the interests of one's own cultural group
NOUN
2. a person who espouses identitarian politics
3. (sometimes capital) a member of an extreme right-wing political movement in Europe that opposes migration and multiculturalism


