Morality is relative to culture... witch burning and slavery were once considered "Moral".
Again, a Libertarian loves him some civilization- but civilization comes with a cost. You can live like the fucking Unabomber fertilizing your vegetables with your own shit.. but the rest of us know we have to do our part to carry the weight.
See, and that's the whole problem - you don't know the difference between right and wrong. No soldier does.
Aright, lemme back off of the flame a little, because I know guys like you meant well. But you have to understand that whatever role you served had nothing to do with defending freedom, regardless of your intent. If you want to defend this country, defend it from the only people who are actually threatening our freedom - the thieves and dominators who you previously worked for. Join or organize a militia and speak out to police and military about the immorality of order-following.
All the world's greatest man-made atrocities have come at the hands of order-followers; people who left conscience and critical thinking at the door and made their body and mind a tool for the will of another. A pile of bodies from here to the moon and back are the direct result of the Roman Centurion, the German Nazi, the American soldier, not understanding basic human rights morality, and taking action from that dysfunctional position.
Morality is not relative to culture.
Understanding of morality is. And this understanding isn't going to come from parents who don't know it either, and it's certainly not going to come from the various state-run indoctrination camps like public schools, police academies, and military bases. The people who run these institutions don't want you to know it, because then you won't do the job they need you to do. All their efforts are on distracting you from this knowledge with media worldview poisoning, nationalism, propaganda entertainment, the faux-philosophy of civics, fear of foreign enemies, etc. Culture itself is a tool for this deception.
Are you familiar with Major General Smedley Butler? Have you read his book? I'll link it below. You are in a unique position to do some real good in the world, and actually defend freedom. Policemen and soldiers will listen to you far more than they'll listen to me. But first you've got to understand what freedom truly means. I sincerely hope you'll take the time to do that work, and a good place to start is with natural law - what it is, how it works, and what its demands it places upon the individual.