Is it permissible to buy meat from German shops, which stun their slaughtered animals before slaughter, and from Turkish Muslim shops in Germany, knowing that Sheikh Ibn Uthaymeen mentioned that it is not prescribed to ask about the method of slaughtering by the People of the Book and Muslims, and that the basic ruling for meat is prohibition according to Sheikh Al-Saadi's jurisprudential rules?

The default ruling for meats is prohibition, and they are not permissible unless slaughtered according to Islamic law (tadhkiyah shar'iyah). A predominant assumption that such a slaughter has occurred is sufficient, as in the case of an animal slaughtered by a Muslim or a person of the Book, unless proven otherwise. However, if there are indications that the Islamic slaughter did not take place, or if the method of slaughter, such as stunning the animal, frequently leads to its death before the actual slaughter, then it is not permissible. The suspicion intensifies if those who perform the slaughter refuse to disclose their method of slaughter. In such a case, a Muslim must exercise caution (wara'), and strive to consume readily available halal slaughtered meat.