Are there authentic hadiths in Shiite books such as Al-Kafi and Man La Yahduruhu Al-Faqih, and is it conceivable that all those hadiths are fabricated?

There might be some authentic narrations in Shiite books, especially concerning the virtues of thehl al-Bayt, but their authenticity is established by the chains of narration of the Sunnis, not by those of the Shiites or their books. The Shiites have not independently narrated a single authentic hadith that has not been narrated by the Sunnis. Ibn Taymiyyah stated that the unique narrations of the Rafidah indicate extreme ignorance and deviation, and that every group other than the People of the Sunnah and Hadith does not uniquely possess any truth apart from other groups.

It is not possible for the Shiites to independently possess an authentic hadith because the authenticity of a hadith requires justice (adalah) and precision (dabt) in its narrators, conditions which the Shiites have not adhered to. Rather, they have collected everything that suits their doctrine, even if it was fabricated. The narrators of their reports are mostly weak or unknown, and even the authors of their books do not meet the criteria of justice and precision, as they were not known for their worship or righteousness. They compile in their books what necessitates disbelief, such as slandering the Quran, the Prophet’s honor, and the Companions. Furthermore, they did not pay attention to the pursuit of hadith or the fundamental principles of its sciences.

The abundance of books does not indicate truth, for the Jews have many books, yet their disbelief is agreed upon. Shiite books were not compiled overnight; rather, they are fabrications spanning hundreds of years, and many of them are merely jurisprudential branches or copies of previous books. What is in the books of the Rafidah falls into two categories: that which establishes their misguided doctrine, most of which is fabricated, and that which is not specific to their doctrine and is stolen from the books of others. Ibn Taymiyyah mentioned that the Shiites take from the commentaries of the Sunnis and the Mu'tazilah, and they are the furthest people from knowing hadith, transmitting what aligns with their whims without knowledge.