Ibne Qudamah...
Ibne Qudamah, one of the most well-known Jurists of the Ahlus Sunnah writes: انه (المرتد) لا يقتل حتى يستتاب… هذا قول أكثر أهل العلم “Indeed he (the apostate) is not executed as long as he repents … and this is the opinion of a majority of the people of knowledge [scholars of the Ahlus Sunnah].” (4) A Summary of the beliefs of the Shia Jurists in Regards to Apostasy 1.
Accepting the teachings of the faith of Islam and entering into it and the subsequent act of acquiring its teachings and acting according to them once a person has accepted the faith is all based upon research, investigation, pondering and thought. 2.
Possessing doubts, questions, and satanic whispers and then going forth to remove the doubts and answering the questions is without a doubt, one of the necessities of the thought process of a human being and as long as doubts and questions remain with a person and they force him to reach a level of knowledge and certainty on those issues, such things remain blessed and praiseworthy. 3.
Doubts, misgivings and questions in regard to the teachings of the faith do not automatically result in apostasy.
Rather, apostasy is denial – with full knowledge – of the principles of the religion (Usul ad-Din) or one of the necessities (Dharuriyat) and clear and accepted (Badihiyat) teachings of the faith such that the denial of those clear and accepted things would lead to a denial of the Usul ad-Din and the person who is denying such things is fully aware of this relationship (between denying the necessities (Dharuriyat) and clear and accepted (Badihiyat) teachings of the faith) and being considered as an apostate.
The ruling for apostasy does not go against the principle of freedom of thought as if the who is conducting research does so with the purpose of searching out the truth and even if he does not reach to the realities – he would be considered as one who is not blameworthy (Qasir) – not culpable (Muqassir).