Is the repentance of one who, out of ignorance, objected to Quranic verses and Prophetic hadiths accepted, then regretted and repented with sincere repentance out of fear of God's punishment?

The scholarly disagreement regarding the repentance of an apostate pertains only to worldly rulings and the punishment for apostasy. As for the acceptance of his repentance between him and Allah, there is no disagreement: his repentance is valid and accepted as long as it occurs before the death rattle. Thus, if a Muslim who has committed an act that expels him from the faith repents, his repentance is accepted.