Just read the "Promise of Allah" which for anyone who believes in God is actually quite deeply stirring on first impression. Obedience to God and to His laws is paramount. These are the words of veteran soldiers who have known only combat , hardship and yet have hoped in the promise of Allah. The Caliphate is seen as the heart of the real Ummah of Allah. The leaders of the West and indeed of the Arab world offer hollow men and ideologies of secularism, nationalism and democracy but the Caliphate is authentic Islam destined to conquer the world. Its reality and its power is in its submission to God. Its people from whatever race or nation, rich or poor are united by the promise. The evidence is apparently in the territories conquered but even if it is displaced it will continue in the indomitable spirit of its warriors and rise again - the true Ummah destined to rule the world.
Now I do not believe the above. There is much that is hollow and blasphemous in Western society but the freedom to live out a calling which God sets and guides is also present in it. Who are the Caliphate to dictate to others that what God has written in their hearts is not correct!? Does the Quran not say that there is no compulsion in religion. Is the Caliphate really a shining example or a vast and oppressive disappointment, known more for its squalor, crippled wounded and low life expectancy. When the territory is taken back ,as it will be ,what is there to assure people that the inevitable and irresistable will of God drives this state. How does the massacre of the innocent and even fellow Muslims square with the notions of noble obedience to Gods will that dominate their thoughts. These people are deeply Islamic but they do not allow even for the pluralism that exists in the Muslim world under the undivided Oneness of God.
Those are my thoughts before I even begin to think about this from a purely Christian point of view. But then I become utterly scathing and all common ground disappears entirely with this devil worshipping murder cult that calls on Gods name to make sense of its insanity and fails as it will fail.