The point being made by the original post was that after the initial workers' uprising of July 1936, the class struggle was derailed both by people who called themselves 'anarchists' and 'marxists'. The CNT and the POUM, as well as the Stalinist party, saved the bourgeois Republic by participating first in the Central Committee of Anti-fascist Militias, and then in the Generalidad, the Catalan government. These organs provided a left cover for the Republic. Anti-fascism was a trap for the workers, leading them to defend one part of the bourgeoisie against the other, when the crying need was for the workers to retain their independence and oppose both camps. In May 1937, when the workers of Barcelona rose up against the Popular Front, both the official 'anarchists' and the official 'marxists' sabotaged the general strike and paved the way for the repression of the workers. Some 'anarchists' (like the Friends of Durruti) and some 'marxists' (such as the 'Bolshevik-Leninists' around Munis) stood with the workers, though none were as clear about the meaning of these events as the Italian communist left around the review Bilan.
I think people should think more carefully about the labels they throw around. The important thing is whether an organisation stands with the working class against the bourgeois state. That's the decisive test.
International Communist Current
"Another very vulgar commonplace is that Marx was a Hegelian in his youthful writings and it was only afterwards that he was a theoretician of historical materialism, and that, when he was older, he ended up a vulgar opportunist." - Bordiga