The major methodological error that drive the extremist away from the mainstream Islam is that they are declaring a fellow Mulsm an unbeliever by misinterpreting and misapplying the verses of the Quran. Al-Bukhari reported: Ibn Umar, may Allah be pleased with him, considered the Kharijites to be the worst of Allah’s creation and he said: Verily, they take verses that were revealed about unbelievers and use them against the believers. (Ṣaḥiḥ al-Bukhari)