They will behead anyone and everyone. People need to stop drinking the kool aid and call a spade a spade.
The ISIS or as our so called leader calls them ISIL (which is an insult to Isreal) are a brutal bunch that need to be exterminated from the earth. They do not believe in harmony, they believe in violence and anger. This demonstration of how low a human being can stoop is the worst in history. Even the Spanish Inquisition was not this bad.
Yes, violent acts such as this will have a long-term effect. While some followers will continue to follow blindly, others will think twice about their allegiance. When they finally see the reality of violence and when they finally internalize this reality, many followers will start to walk away from ISIS.
Since I don't know if it is talking about soccer or gridiron football, I will stay in a general sense. ISIS has no relation to sports. They never have;although apparently now they do just for saying it "Anti semetic"? Come on. However I do think that ISIS' dislike for a certain sport has no credit, nor do people care about it much. What they do care about are the beheadings that came along with this statement.
Ther followers of ISIS follows violent ideology so I think beheading of the four players is not going to change mind of anyonw who supports ISIS. When they didn't change their mind when ISIS was following violence and behading innocent people, I don't think they are going to do that now.
The indoctrination of being a devout Muslim into children from the moment of birth creates a population that doesn't question it's leadership or principles. By being obedient and following the misguided leadership this population later acts upon those principles believing they are not only right to do so but entitled by whatever means necessary to rid the world of the perceived infidels.
ISIS has perpetrated and encouraged so many atrocities, from murder to rape to torture, that its followers are hardly going to be put off by their denouncing football and decapitating four players. If their followers condone their previous actions, there's no reason they won't condone the latest acts of terrible violence.