Bakunin predicted correctly that Marxist dialectical theory and the proposed movement towards Communism via Socialism existed solely to subvert Anarchist projects. This is perhaps the single funniest part of the hilarious, humiliating failure of 20th century Leftism.
In Revolutionary Catalonia where the closest thing to an actual Communist project ever was established, what was it that destroyed the organization? Was it ebil Cabidalists subverting the country? Was it a fascist dictator crushing them? No! The fall of Revolution began with Comintern agents attempting a coup to secure the fledgling anarchy as a Communist asset. This infighting allowed outside forces to crack apart what was otherwise a very well armed and productive (if dystopian and shitty) experiment in Anarchy. The hideous, hideous tortures and deaths of the many Leftists who fought in its defense were of course richly deserved and entirely just, as was the mass rape of their whore women and the experimentation to discover the biological roots of Marxism, but personally I would rather we had allowed the experiment to run its course and fail more spectacularly than by something as banal as Communist infighting.
So thanks Tankies, you did a great job blowing up your only actual success story for a classless stateless society, we could've gotten to see them all starve to death properly if you'd just waited a few more years before fucking it up.