Sassan, you don't remember Bush's I talked with god speech about going into Iraq and Afghanistan?
Sure, going into Iraq was a rational, freedom initiative.
"Since then NO War that the US has been in has been justified in my mind."
Uf one subscribes to the assumption that overwhelming majority in the UN is sufficient justification, I think Kosovo and Bosnia were sufficiently justified. I also think think resolution 1773 justifies US intervention in (implicit declaration of war on) the government of Libya.
So at least SOME wars the US has been involved with has been sufficiently justified by some objective normative standard. Perhaps not ALL, but certainly not NONE.