You’ll see anarchists praising Rosa Luxemburg, who if they had actually read her writings – they would see that she was very clearly one of the “authoritarian” socialists that they rail against so much.
You see them praise the Black Panthers, who were supported financially by the DPRK and aligned themselves with the Juche ideology of Kim Il Sung.
They even praise Thomas Sankara, who purged anarchists and arrested syndicalists.
If these people had succeeded, i have no doubt in my mind that anarchists would call them “tankies,” they would call their experiments “capitalism with a red flag.” And I also have no doubt in my mind that if the October Revolution, Chinese Revolution had been crushed, they would hail Lenin and Mao as proletarian heroes.
I doubt very much that they have ever read Rosa Luxemburg. The most they pick up on is the nonsense that Luxemburg had something against the Russian revolution, which is not true.
Anarchism lacks a materialist basis. Above all, an understanding of the role of the state.
The differences between anarchism and Marxism were decided well over 100 years ago. Those works are still relevant, so it is enough to read them.
Rosa Luxemburg’s writings are more closely related to Trotskyism and disagrees with the notion of a monolithic party, essentionally saying it isn’t democratic enough. It’s a derivative of marxism just like anarchism i.e. it doesn’t subscribe to many of the ideas of leninism.