The famous Tabi’ Wahb ibn Munabbih wrote imagining how life would be if the extreme Kharijites at his time took over and rule the Muslim societies:” I knew the early period of Islam. By Allah, the Kharijites never had a group except that Allah caused it to split due to their evil condition. Never did one of them proclaim his opinion except that Allah caused his neck to be struck. Never did the Muslim nation unite upon a man from the Kharijites. If Allah had allowed the opinion of the Kharijites to take root, the earth would have been corrupted, the roadways would have been cut off, the Hajj pilgrimage to the sacred house of Allah would have been cut off, and the affair of Islam would have returned to ignorance until the people would seek refuge in the mountains as they had done in the time of ignorance. If there were to arise among them ten or twenty men, there would not be a man among them except that he would claim the Caliphate for himself. With each man among them would be ten thousand others, all of them fighting each other and charging each other with unbelief until even the believer would fear for himself, his religion, his life, his family, his wealth, and he would not know where to travel or with whom he should be”.

Imagine if ISIL or Al-Qaeda with the modern armory took over what will happen in our so societies and our world!!!!!. (Ibn Asakir: Tarikh Dimashq)