According to SyrianRebelWatch, the killer is member of Al-Qaeda. He remarks that the victims are

begging for their lives and insisting that they are Sunni (Christians or Alawites would meet with certain execution if captured) before one is shot in the arm. The cameraman then proceeds to shoot randomly at the prone captives before shouting ‘”You need to know who you are messing with, we are the al-Qaeda organization, you dogs.”

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Posted by Theodore Shoebat