Waarom Syrische rebellen ISIS aanvallen

All this fighting [between rebel forces] will only weaken the revolution and help the regime. We, in the Islamic Front, did not take the decision to fight ISIS, but whoever did it had his reasons because of the way ISIS treats other groups. ISIS denies reality, refusing to recognize that it is simply another group. It refuses to go to independent courts; it attacked many other groups, stole their weapons, occupied their headquarters, and arbitrarily apprehended numerous activists, journalists and rebels. It has been torturing its prisoners. These transgressions accumulated, and people got fed up with ISIS. Some of those people have attacked ISIS’s positions, but ISIS was first to attack in other places, bringing this on itself.