Marx treated the proletariat and class struggle as ideological constructs

Evidence

Perhaps the most obvious of the ideological constructs that appear in the work of Marx and Engels (and most of the Marxists who have followed them) are the notions of the proletariat as the revolutionary subject, and the class struggle between the proletariat and the bourgeoisie. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 276

Categorization

• XREF: Connects to the Frankfurt School history being read — their critique that marxian categories themselves carried ideological freight. — connects to: The working class as loyal subject differs from the proletariat as dissolved subjectivity — Mark Fisher (edited by Darren Ambrose), K-Punk: The Collected and Unpublished…, 973