Fair enough.
I know the US can never really "win" in international politics, its unfair and the US draws significant undeserved criticism at every turn.
In this case, however, the people are screaming for direct intervention by the United States, not the UN. That actually is a very telling situation and one which is a point of pride for the United States. The people want peace over there so that they can live without a constant threat of war and see the US as the only country potentially willing and able to devote the resourses to do it based on recent events in Iraq.
We can all sit back and say Africa is, and always has been, a festering cesspool of corruption and dictatorships and that it isn't our problem. Liberia is just one country and the US can't help everyone. I just can't help thinking that this is a great chance for the US to start something that just might turn that situation around.