War Through UN Still War, Still Hell, Still the Worst Option
The problem with bombing Libya is not hypocrisy. Better a good thing once than consistent bad performance, after all. The problem is that war is uncontrollable, usually spreads, always kills, rarely achieves its objective, creates blowback (al Qaeda wants the US in Libya for its recruitment purposes), costs a fortune, and maintains imperial interests.
While the US props up all the nearby dictators and arms them, including in Bahrain, and was doing the same for Gadaffi until about 5 mins ago, it's switched sides in Libya. This doesn't just look bad. It is bad: the US wants to control someone else's country.
When the Iraqi govt murders and tortures after years of US involvement, who cries out for the solution of US involvement? When the Afghan govt or Bahraini govt does so, what then? No fly zones were themselves genocidal in Iraq and Yugoslavia.
Saudi Arabia is helping out Bahrain, by the way. Nations joining in each other's violence or spreading around the weapons we've provided them is not good news.
There is not a well-intentioned world police force at work here, and the bad intentions will lead to very bad places and are not the only option. Other options include humanitarian aid, nonviolence training, and communicating to Libya the seriousness of US support for local rule and democracy by cutting off the dictators we're backing all over the region.