Radicals consider the commands of God in the Book He sent as insufficient. For instance, salat (prayers) is explained in the Qur'an yet they see it as insufficient and try to add things to it. Fasting for instance; they look at the Qur'an and see it as insufficient. They try to add things to it. They try to add things to every other religious act. But if there is something that is in conflict with their own interests, then they try to subtract things from those commands. They say, "This verse has been nullified, the command of this verse has been lifted". - Harun Yahya