The ruling on one who slaughters at graves after the proof has been established against him

Question:
A man says: A person slaughters at the graves, and it has been conveyed to him that this is shirk (associating partners with Allah), but he did not refrain and continued in his state. Does he become a disbeliever, or what is done with him?

Answer:
There is no doubt that if it is conveyed to him that this is shirk and he does not stop, he is confirmed as a disbeliever, because he has become one who has been confronted with the proof, not out of ignorance; the command did not come to him in a state of ignorance, because the proof has been established against him. If he persists, he is confirmed as a disbeliever, because slaughtering for other than Allah is major shirk. Slaughtering is an act of worship, and worship is not permissible to be directed to anyone but Allah (Exalted and Majestic is He). However, if he is in a land where there is an Islamic authority, his case is referred to the authority to take action against him: either he repents, or he is declared a disbeliever. As for if he is in a land where there is no Islamic authority, it is sufficient that the proof is established against him.