Your NAP has no answer to this question: What do you do if you meat a person of another ideology who is not willing to follow your NAP? You can't really enforce it because it will be a violation of your NAP. So hence, everybody need to voluntarily follow your NAP which is not the case in the real world.
I can't think of any ideology that doesn't have at least one Achilles heal. The NAP is it in spades for libertarians and their like.
Certainly it must be aspirational rather than absolute. Any attempt to follow it absolutely leads to laughable results. It is not aggression for my child to allow his bicycle bell sound waves to enter my neighbor's property but it most certainly is for me to aim a sonic canon at it.
The notion that private property is absolute leads to equally preposterous mind games as does any attempt to eliminate private property altogether.
I am not a libertarian but I attempt to weave the fabric of the nonaggression pact into my daily life. Any good Christian would, I believe. But it is not the ruling factor in my life. It is something to which I aspire and perhaps even more, wish others would aspire.
I am a retired soldier. I served during a couple of wars. I am well acquainted with the application of and defense from violence. I dislike violence intensely. I am certainly not naïve enough to completely rule it out. Oddly, it may seem to some, I find those who most stringently eschew violence, dangerous. Their attitude leads to carelessness and victimization. This leads to a permissiveness in the face of wrongdoing that encourages more wrongdoing. When does passivity end and enabling begin? What duty have I to protect my fellow humans even if it means that I must resort to the violence I abhor?
I am persuaded that John Rawls, with whom I have engaged several times over the years, has this about right. We could argue about the level of dogmatism we might insist upon/accept but that is just politics after all. We might argue until one of us hits the other with a stick but what can you do?
Note to Mercenary. John Rawls is one of the most respected posters here. If you can't learn from him (as most of the rest of us have done) at least you could try being just a bit polite.
"We won with poorly educated. I love the poorly educated." Trump.
"I could stand in the middle of Fifth Avenue and shoot somebody, and I wouldn't lose any voters, okay? " Trump
The American dream is about freedom. Pelosi