There are a few problems with the entire situation.
First… the rebels are being backed by Al Queda. Therefore, we cannot arm the rebels.
Next… The pres set a “Red Line” with the use of chemical weapons. There is now proof that chemical weapons were used. Now, NOT doing anything would set a dangerous precedent. North Korea has a red line as does Iran… so if we don’t follow through with our threat of intervention, those other countries will see us as weak.
My personal opinion is.. set a no-fly zone and get some intel on where those weapons are and take them out. No feet on the ground other than intel gathering. And no providing support for the rebels.