Complex sentence: Many mainstream Muslims of both the Sunni and the Shiite sect regard these people as heretical to Islam.The "Quran Alone" people defend themselves by claiming that all the radicalism caused by the Muslims in the world today is the outcome of hadith.
Split into simpler sentences: Many mainstream Muslims of both the Sunni and the Shiite sect regard these people as heretical to Islam. The Quran Alone people defend themselves against such accusations by claiming that all the radicalism caused by the Muslims in the world today is the outcome of hadith.