"that song was "The Soldier" by my pretty conservative buddy Harvey Andrews. He got RAKED for that one."

Whether Harvey has whatever count as conservative views or not, I can't see The Soldier as being in any real sense conservative. I'd see it as one of a long line of songs which point out the pointless waste of war, and the humanity of individuals who get caught up in it.

I think applying words like conservative in the context of international conflicts doesn't make much sense. A while different set of value judgements come into it when you are deciding whether to support or oppose "your own" side.