ISIS has some mistakes and deficiencies: They do not abide by the Qur'an. They make additions to the commands of the Qur'an from Bukhari, Muslim, Tirmidhi. Just like many other conservative Orthodox Muslims, just like Shias, Sunnis, Wahhabis, they are making additions; and that is what happens when you make additions. Violence and terror comes about. I am against violence. We know from the hadiths that this will all be put right when Mahdi (pbuh) comes. - Harun Yahya