Libyan no fly zone

While I am in support of the no fly zone over Libya I believe it might have been implemented sooner so as to have been more effective. I am reminded of a quote from Edmund Burke "All that is necessary for evil to triumph is for good men to do nothing". I feared that was what was going to happen in Libya to the rebels, but then how do we know who these rebels are and what do they stand for. Again i say I am in support of the no fly zone, but I also worry that we might be helping a radicalized form of Islamic rebels to defeat a brutal terrorist sponsoring dictator. I don't know what would be better to the long term safety of the U.S. I believe supporting the rebels would be, but history will tell.