Syria vs US Credibility
One big deal is that when Hussein used chemical weapons against Iran, we knew it was happening, and instead of raising a stink, we gave him logistical support. Our credibility with regards to international law is heavily tarnished, and that undermines our claims in present day Syria.
What I would love to see is if Congress, in authorizing military action, also passed some kind of Whistle Blower Compulsion bill: if you see something, you must say something!! If you are aware that a war crime or a crime against humanity is being perpetrated, you have to tell everyone you can think of: your boss, your mom, your blog, the New York Times, hell, even tell that douchenozzle Julian Assange! Failure to disclose knowledge of such crimes should consequently open you to charges of criminal conspiracy once they are finally disclosed.
(. . . not like we would ever prosecute Americans for War Crimes, but a boy can dream . . .)
As far as the current situation in Syria goes, I am reminded of Serbia. After a few too many abuses Clinton sent in air power to disrupt their military command and control and mess up the power grid. We basically put our thumb on the scale to expedite our preferred outcome. From what I can tell, our short-term preferred outcome in Syria is a stalemate (brutal dictator vs Al Qaeda) so I don’t reckon we’ll spend much time with our thumb on the scale.
The long-term desired outcome, which is the real reason we need to take the idea of intervention seriously, is to discourage the future use of chemical weapons. “Remember when Assad looked like he might win the civil war in Syria but then he gassed civilians and the US started bombing him? Yeah, maybe we shouldn’t be too quick to reach for the chemical weapons.” This is what I hope will be an outcome of our bombing Syria.