An honest study of the Quran shows that groups like ISIS act in complete defiance of the injunctions of Islam. The Quran, for instance, equates one murder to the elimination of the whole human race (5:32), and considers persecution and disorder on earth as an even worse offense (2:217). It lays emphasis on peace, justice and human rights. It champions freedom of conscience and forbids worldly punishment for apostasy and blasphemy.

Source: Did Prophet Muhammad Warn Us of ISIS? | HuffPost