You know, I've been political, and political about the fringes, for a very long time. I remember arguing with anarchists in high school. Ah, nostalgia! And for years and years I argued with anarchists, and I was always frustrated that they seemed to have the core of something good, but kept asserting the strangest things in support of it.
You know what helped me legitimately understand their views?
"Libertarian socialism" is, historically, a synonym for "anarchism".
Replace that mentally every time you see "anarchism", and "state" with "authoritarians" whenever anarchists speak, and the whole thing makes much more sense.
I've spent literal dozens of hours of my life over the years arguing with anarchists over the singular issue of "How is a state defined", and got nowhere. I still think they're wrong, but I accept that most aren't going to change their views on how to define a state from an internet quarrel.
But if you get around to the fact that, to the eyes of people like us, what they're advocating for is a much more democratic, much less hierarchical state, which is what their policy proposals for their theoretical community amount to, it shakes out to a much more sustainable model. When I'm sitting here defining state as "Decision-making bodies' monopoly on communal coercion" and they're sitting there defining it as "Unjustified hierarchy", their argument of "Get rid of the state" is going to sound insane to my ears, but 'translated', so to speak, is less objectionable.
Now, one of the core issues that I still have is that I'm uncertain about the long-term viability of highly-mobile military conflict with a powerful organized state, but that has much more to do with questions of scale and OODA loops than an inability to effectively respond to violence conceptually. As far as internal stability or fending off groups of similar size (or even somewhat larger size, considering that modern warfare in particular privileges the defender), I think the historical performance of libertarian socialist militias shows that it's far from an insurmountable task.