Konflikten i Syrien

Several days ago, the Islamic State of Iraq and the Levant, or ISIL, the rogue al Qaeda affiliate in Syria, murdered Kamal Hamami, a Free Syria Army military commander who also was a member of the US-backed Supreme Military Council. From Al Jazeera:

Kamal Hamami, a member of the FSA's Supreme Military Council, known as Abu Basir, was killed in the Turkmen mountains near the northern city of Latakia, spokesman Louay Meqdad told Al Jazeera on Friday.

Meqdad said the commander was killed after a heated debate with a local leader of the Islamic State of Iraq and the Levant in which the leader called the FSA "infidels".
The Free Syrian Army issued an ultimatum to the ISIL: turn over Abu Ayman al Baghdadi, the al Qaeda emir in the Latakia region who executed the FSA commander, or face "justice." The FSA spokesman interviewed by Al Jazeera
"We demand that the international community supply us with arms to get rid of this disease," he says at the end of the interview.

FSA units often fight alongside the Al Nusrah Front against the Syrian military, and some top FSA leaders are sympathetic to or downright supportive of al Qaeda. Also, in the unlikely event of an all-out clash with the FSA, the ISIL will be able to call on other nonaligned Syrian Islamist brigades, and would probably receive support from the Al Nusrah Front, if the FSA decided to make good on its threat.