Marxian economism led Marxists to dismiss nationalism as backward ideology.

Evidence

Unfortunately, the relegation of consciousness in the Marxian logic to a reflex of the relations of production and the frequent preoccupation with capitalism as a system determined by its own objective laws and the motivating force of historical change, most consistently led to the conclusion that nationalism among working classes was contrary to the historical movement of modern societies. In this sense, nationalism was a backward ideology, often a means of deflecting the class struggle into imperialist wars, and in any case not a fit subject for serious study in its own right since it was merely a politically convenient conduit of other forces and interests. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 361

Categorization

• XREF: The economism critique is the theoretical ground on which Robinson builds the Black radical tradition as a cultural-not-class formation. — connects to: Hayek and Röpke explicitly rejected economism and economic reductionism. — Jessica Whyte, The Morals of the Market: Human Rights…, 20