@Vertraumir> 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.
I don't know who "we" is in this sentence and under which organization the goal is to "protect Marxism" from its enemies, when the enemy is capitalism. The process we refer to as revolution, the total destruction of capitalism, must be maintained as the core goal under which organization exists, to defend Marxism ideologically against other ideologies would have been secondary.
In terms of tactics, there have been factions of m-l organization that consider the possibility of improving relations with anarchist/libertarian groups as well as other revolutionaries (Trots..somethings) in order to improve the chances of successful transition, then use and deal with adversaries at a later stage.
On the other hand reformist Marxists are tactically more dangerous and need to be dealt with as adversaries, if not outright enemies of the dictatorship of the proletariat than revolutionaries are. Therefore the issue is not as simple as some people rush to laugh and clap about, or try to collectively convince themselves as superior.
In any case, within revolutionary anti-capitalism within 150y of friction, there had better been a synthesis than a preservation of antithesis and avoidance. For the m-l movement to be reduced to a tiny elite and the anarcho-communist/liberarian-communist periodically to be exploding with dynamic presence, especially among working class youth, students, unemployed, etc. in many corners of the globe, a logical group would have to sit down and rethink, at least tactics, before it throws up a party of superiority triumph.
So, what would happen in the 6th International has yet to be thought about.