Question 275: On slaughtering a sacrificial animal, some people turn their sacrifice to the direction of the west. They may also slaughter at places where other people slaughter their sacrifices for other than Allaah. Is it permissible for us to eat from the meat of their sacrifices?
Answer: Slaughtering an animal is an act of worship that must be devoted sincerely for the Sake of Allaah Alone. It is not permissible to slaughter an animal for other than Allaah, or in places where others slaughter their animals for other than Allaah. Therefore, Allaah prohibits eating from the meat of the animals slaughtered on Nusub (stone-altars) even if Allaah’s Name has been mentioned before slaughtering them. Also, Allaah forbids the believers to do this, as Nusub were stone-altars round the Ka`bah where the Arabs used to slaughter their animals for other than Allaah. Subsequently, it is not permissible for the believer to slaughter animals in the places where other people slaughter theirs for other than Allaah. This implies acting like them and, you may be influenced by their false beliefs. The meat of the sacrifices slaughtered at these places is unlawful and it is not permissible for you to eat from it... read more here.