Ignorance is not an excuse in matters of creed

Question:
Prostrating and slaughtering for other than Allah, if done out of ignorance, or so on, is there a difference between ignorance and deliberate intent?

Answer:
This is one of the matters that are not subject to ignorance. Whoever does it commits disbelief, and if he is sincere, he must repent. If he repents, Allah accepts his repentance. The polytheists repented and Allah accepted their repentance on the Day of Conquest, although their disbelief and misguidance in Makkah were well known. When Allah conquered Makkah and they entered into the religion of Allah, Allah accepted them.
As for the prostration of Mu'adh ibn Jabal to the Prophet (peace and blessings be upon him), he was interpreting it, thinking it was permissible. The Prophet (peace and blessings be upon him) explained to him the prohibition of that after the Shari'ah had been established. He taught him that prostration is for Allah, based on the saying of the Exalted: [Al-Najm:62]. The matter ended there. Mu'adh was ignorant, so the Prophet (peace and blessings be upon him) taught him, after the Shari'ah had been established, and he taught the community that prostration is for Allah, as the Exalted said: , and the Exalted says: [Al-An'am:162]. Thus, it has been made clear to the Muslims that whoever prostrates to other than Allah is a disbeliever, and he must repent.