You want to know how the religious standing of a group like the one currently in the news these days may feel to a Muslim not sick or savage like those in a group like that? What if that same group was claiming that they fight with instead of against the American forces? How directly contradictory to the facts such a claim would be? That is the level of direct contradiction and externality to the religion their religious standing claims feel. Even if we start from a level away from why they are fighting and killing, where in Islam it says that someone can be held responsible for the actions of others? Where does it say that you can take hostages let alone killing them? More than that, as it relates to their recent savagery crime, killing a messenger has always been showing the level of criminality and savagery everywhere. A news reporter is like a messenger with the additional benefit to you of being a messenger for you instead of just to you, doing you the favor of carrying your voice to the outside.