i think that maybe the point that the author is missing, in the moment if not more generally, is that there is no "after the revolution".

abolishing the state is not something that happens at 3:00 next wednesday afternoon, but a process that will carry on for the next ten thousand years.

so, to say something like "anarchists wouldn't be anarchists if they rejected the concept of human nature" is to essentially fall into a lenninist trap. it assumes a day after the revolution exists, and we'll still have the same nature, and will still need to restrict ourselves. neither marx nor any of the early anarchist thinkers, all of whom were ultimately hegelians remember, would have seen the revolutionary process as anything like that - they would have all seen it as a, well, evolution from one state of society to the next.

yes, there will be punctuated periods of necessary violence, as the struggle brings itself to a head.

but, we don't really have to sit here and wonder about what happens after the revolution, because that's not how this actually happens.