Proponents of mutual aid networks aren't trying to "replace the state". I'm not sure which anarchist ideas are supposed to accomplish that (if any): as I understand, different philosophies have different views on that. "Provided the existing society doesn't fight back" was a reference to the repeated criminalisation of Food Not Bombs.
I say "even" because afaik Marxists don't seek to destroy the state: they believe the destruction of the state is inevitable (dialectics!), and seek instead to win battles in the class war – my "even" applied to the "withering away of the state" idea, not to Friedrich Engels himself. (I'm not familiar with all of his ideas.) Marxism–Leninism is the "the Bolsheviks were right all along" belief system, but is quite different to classic Marxism.
In the real world I don't think we'll ever have a group, region, or territory governed by any pure ideology, so I agree that a state of anarchy, or a classic communist society, would never happen in real life. That doesn't mean it's worthless to think about the ideas, any more than it's worthless to talk about uniform point masses on a frictionless inclined plane.
I say "even" because afaik Marxists don't seek to destroy the state: they believe the destruction of the state is inevitable (dialectics!), and seek instead to win battles in the class war – my "even" applied to the "withering away of the state" idea, not to Friedrich Engels himself. (I'm not familiar with all of his ideas.) Marxism–Leninism is the "the Bolsheviks were right all along" belief system, but is quite different to classic Marxism.
In the real world I don't think we'll ever have a group, region, or territory governed by any pure ideology, so I agree that a state of anarchy, or a classic communist society, would never happen in real life. That doesn't mean it's worthless to think about the ideas, any more than it's worthless to talk about uniform point masses on a frictionless inclined plane.