Re: “ISIS has nothing to do with Islam”.
Do a majority of Muslims condemn other forms of terrorism carried out by Muslims in the name of Islam or do they try to find justification for who created them, the big bad USA, Israel, conspiracy of the west etc ? Examples are Al Qaeda, Taliban, Hezbollah, Palestinian terrorism, LeT, LeJ and the list goes on.
The problem is that once you try to justify any one of these groups, you lose the moral ground to condemn ISIS since is just a few degrees more extreme in terms of its methods and the cause that it stands for.