Straight Up Lying
In a week time both US President B Obama and the U.N. both said:  
ISIS has nothing to with Islam.
This is just false. Everything they do is because of their faith in Islam. All the rules and actions are based on there interpretation of Islam. To say it has nothing to with Islam is just straight up lying.

This doesn't mean all Muslims are like that and of course there are more peaceful interpretations of Islam. But saying that ISIS has nothing to do with Islam is just fooling yourself.