"That means I will not hesitate to take action against ISIL in Syria, as well as Iraq,"

Although I would like to see the decapitators wiped out, this is a very dangerous course for us all.
Mr Obama could sanction bombing of president Assads forces as well as IS, bringing us into another confrontation with Russia.

Russia backed Assad because he was prepared to stand up to the Islamist Militias,   the FSA was simply a cover or at best "useful idiots" for the extremists.
If the West removes Assad under cover of an attack on the Islamists, the results could be grave.