Difference between Al-Nusrah Front and FSA: the latter wants beheadings to be kept private

"Justice was swift and brutal when fighters of the Al Nusra Front militia caught a man accused of raping and killing a young girl in front of her father. They beheaded the man and left his body in the street.  The presence of women and children didn't deter them. Neither did the appeals of other rebels at the checkpoint in the embattled neighborhood of Salahuddin.  Members of the Free Syrian Army, the main rebel force, said that the man was a member of a pro-government militia and that they had no doubt he was guilty. They also had no objection to killing him, but they did object to a public beheading."