"Why do you think it's more moral/ethical to abstain of supporting military? .... Maybe it's just not in people heads that world and homeland safety is not given for free and granted forever."

Well unfortunately most armys today (and especially your US-Forces) are not really "defensive" armys. Despite they all hypocritely call themself that. They are mostly very offensive conquering ones. Where is the connection again to homeland safety, when you invaded Iraq, Libya, Syria...? It is simply about dominance. So sure you can say, it is for world peace - all accept our empire and we will have peace. But that is not really my definition of peace nor freedom. (and not a working one, with so many other wannabe nuclear empires around)

I was also not in the military because of that. I would defend germany in germany, but not in Afghanistan. But when you join the military or work for them - you can't really choose only for the defense part. This would only be possible if we would have only armys for defending (so in switzerland I probably would have served).

And about real international peace-keeping missions, to protect against genocide etc. - well, that is a different story. UN-Troops are an option, even they got used for dominance and powerplay as well and lost credibility because of it. But when a nations army goes into a different country to fight a war - it is allmost allways about dominance.