universalising the "nation-state" as a bourgeois concept dismisses liberation struggles of imperialised peoples as wholly (or worse, secretly) bourgeois efforts while also diagnosing the international proletariat as too stupid to meaningfully steer any of its cultures on its own.
Socialism is not the democratic perfection of the nation-state but its abolition. Seeking to preserve the it is to remain confined within bourgeois society. The emancipation of the proletariat is necessarily international and transcends national divisions.