The ruling on intentionally killing a believer and the disagreement regarding his entry into the Fire

Question:
We say, Honorable Shaykh, does the one who become a disbeliever and remain in the Fire?

Answer:
I mean, he does not become a disbeliever, but the warning applies to him that he will be punished in the Fire. Ibn 'Abbas holds that the warning must be carried out against him and that he must enter the Fire; he must enter the Fire, but he will not remain in it forever. As for the majority, they hold that it is under Allah's will: if Allah wills, He will put him in the Fire, and if He wills, He will forgive him, like the rest of the soldiers. If . The hadith of the one who killed ninety-nine souls, and killed the one who was the hundredth, and when he repented, Allah accepted his repentance. This is the disagreement between Ibn 'Abbas and the majority. They agree that he will not remain in the Fire, that he is not a disbeliever, not according to Ibn 'Abbas or anyone else; he is not a disbeliever. But Ibn 'Abbas holds that he must enter the Fire, and the majority say there is no necessity for it: if Allah wills, He will put him in the Fire, and if He wills, He will forgive him.