ما حكم التعرف على الديانات الأخرى، وما المصير إذا مات المسلم وهو يفعل ذلك، وهل يُعدّ ذلك مرضًا في القلب يؤدي إلى النار؟

A Muslim is not required to research other religions, and there is no sin upon him if he dies without having examined them. Rather, it is impermissible for him to read books of other religions if he cannot distinguish truth from falsehood. Reading them is only permissible for people of knowledge who are capable of refuting their adherents with evidence and inviting them to Islam.