Execution in Idlib by Jabhat al-Nusra. Victims are apparently "Sunni supporter of Al-Assad". The white jihadists are Chechens and perhaps Dagestani judging from their Russian accents. The same ethnicity as the Boston bombers, if you remember the younger bomber on his vkontakte page had web videos supporting jihad in Syria. The most disturbing aspect is all the little children there cheering people being beheaded. Once again nearly every single Militia in Syria follows the ideology of this group and American aid, weapons, training, and political influence are helping these groups advance their goals.
And always the familiar wail "allahu akbar!"