The ruling on declaring a specific individual a disbeliever if he commits one of the nullifiers of Islam

Question:
This questioner asks: Does a specific person become a disbeliever if he commits one of the nullifiers of Islam? And who interprets it that way?

Answer:
A specific person who commits an act of disbelief or speaks words of disbelief, other than a slip of the tongue. Because he becomes [a disbeliever] and we rule against him based on the outward appearance. As for the inner reality, his affair is with Allah. Unless he is ignorant, like one who is ignorant, then we explain it to him. If he accepts it, then he accepts it. If he is ignorant, like one who comes from a faraway country and does not know about this disbelief or this shirk (associating partners with Allah), and we explain it to him, if he accepts it, praise be to Allah. If he does not accept it after the explanation, we rule that he is a disbeliever.
As for a person who lives among the Muslims, studies in the schools of the Muslims and the homes of the Muslims, and hears the Qur'an, and then commits a nullifier of the nullifiers of Islam, there is no doubt about it, because he is not ignorant.