Earlier quoted context omitted.
I think you have a deep misunderstanding of libertarianism (which is your right of course). Libertarians don't necessarily not believe in laws, they simply don't believe in a monopoly of laws and law enforcers. This is kind of the whole point. Its clear that in your world view "justice" is somehow inexorably tied to government, but there others that disagree (which leads to your confusion in thinking that because som…
"they simply don't believe in a monopoly of laws and law enforcers" Ahahahahaah! That's the same as not having laws! And even then, what you're saying is they believe someone should bring this guy to justice...and then do nothing to him. Then it's not justice. You're killing me my friends. Just killing me here.
I'm nearly as far away from libertarian as one can be, but no - it's not the same as not having laws.
Example: Old (American) West-style "frontier justice" where a bunch of townspeople form a posse or a lynch mob or whatever to right some (real or perceived) wrong.
(edit: I do understand that this is only one possible scenario, and not what all or even many libertarians want)