OK:
1. The last war that America has been in that I think was in any sense justified was 1812. I don't defend either World War. So I don't think there's a person living today who TRULY fought in an "honorable" war. Ultimately, justifying what happened in WWII comes down to utilitarianism and preemption. America murdered a LOT of people in that war, far more than were killed in Iraq. Even if you view the German and Japanese Military as legitimate targets because Japan attacked us after we provokd them, the killing of civilians in Dresden, Hiroshima, Nagisaki, etc. is no better than murder.
2. Since when has the military been treated horribly when they've returned? For every person like me there are a thousand who will call them "heroes" and say they "fought for our freedom." Vietnam vets were spit on when they returned. Have you seen how many end up homeless nowadays? The ones who don't commit suicide because the military pumped them full of anti-depressants? VA Hospitals treat them like cattle. They get screwed out of their benefits.
3. I'm not saying you have to condemn them, although I do, I don't believe ignorance or wicked philosophy is an excuse (I really don't expect any better out of unbelievers, but I find the fact that CHRISTIANS support this kind of stuff absolutely disgusting.) I think its possible not to condemn them while still thinking its ridiculous to pretend like people getting ticked off that their precious memorials are blocked off has anything to do with real liberty. For some of those people, the memorials represent memories and friends who lost their lives. Some people have to have something to hold onto and not everyone understands the true concepts of liberty.
4. We're never going to "Get through to people." Most people are immoral and don't care. Most people have a wicked worldview. And if we did get through to them, and by "we" I mean the real liberty movement, not the phony "small government but law and order" types, would they join at all? Or do you mean something more like "Had the liberty philosophy presented to them?" Does that mean we stop trying?