In claiming responsibility for the Paris atrocities, the so-called Islamic State described the attacks as "a blessed battle whose causes of success were enabled by Allah". Last year, when the group's self-imposed Caliphate was declared, hundreds of Muslim leaders and scholars from across the world wrote an open letter to the self-professed Caliph, Abu Bakr al-Baghdadi, accusing him of heinous war crimes and a violation of the fundamental principles of Islam. So how Islamic is 'Islamic State'? Why have mainstream interpretations of Islam so far failed to provide an effective counter-narrative? What needs to happen for the group to be defeated?

William Crawley discusses the beliefs which underpin the so-called Islamic State in the light of the Paris terrorist attacks with Sheikh Dr Salah Al Ansari, an Imam, theologian and academic; Haras Rafiq, Managing Director of the anti-extremism think tank, the Quilliam Foundation; and Dr Katherine Brown, an expert in Islamic Studies at King's College London.

Producer:

Series producer: