We believe that the Anarchists are real enemies of Marxism. Accordingly, we also hold that a real struggle must be waged against real enemies. Therefore, it is necessary to examine the “doctrine” of the Anarchists from beginning to end and weigh it up thoroughly from all aspects.

The point is that Marxism and anarchism are built up on entirely different principles, in spite of the fact that both come into the arena of the struggle under the flag of socialism. The cornerstone of anarchism is the individual, whose emancipation, according to its tenets, is the principal condition for the emancipation of the masses, the collective body. According to the tenets of anarchism, the emancipation of the masses is impossible until the individual is emancipated. Accordingly, its slogan is: “Everything for the individual.” The cornerstone of Marxism, however, is the masses, whose emancipation, according to its tenets, is the principal condition for the emancipation of the individual. That is to say, according to the tenets of Marxism, the emancipation of the individual is impossible until the masses are emancipated. Accordingly, its slogan is: “Everything for the masses.”

Clearly, we have here two principles, one negating the other, and not merely disagreements on tactics.

From Anarchism or Socialism by Stalin. The work goes more in-depth, even the foundation of Marxist theory, that being dialectical materialism, is something that it is rejected by our anarchist “comrades”.