The wickedness of al-Ashʿarī's discourse is an effeminacy, Its twisting resembles the twisting of the deceitful.
This al-Ashʿarī adorns his discourse, And taints it with poison, O what an evil tainter!
He negates details and affirms a totality, Like a woman who unravels her braids after tying them firmly.
He asserts Interpretation regarding the Sunnas of guidance, His audacity in the religion is the audacity of a destroyer.
He subjects the verses of the Attributes to Interpretation by his opinion, And deceives the naive, so how wretched is the deceiver!
Ibn Taymiyya, may Allah have mercy on him, said in Majmūʿ al-Fatāwā (17/471): "Al-Ashʿarī and his likes are an isthmus between the Predecessors (Salaf) and the Jahmiyya." End quote.
He said in al-Fatāwā al-Kubrā (6/621): "Indeed, Abū al-Maʿālī and his likes author books of scholastic theology (kalām) whose principles they received from the Mu'tazilites and the philosophers... And the principles he establishes are the principles of Jahm b. Ṣafwān regarding the Attributes, predestination, and deferment (irjāʾ)." End quote.
I say: Whoever among the people of the Sunna declares the Ash'arites to be disbelievers, his declaration of their disbelief goes back to several violations in the chapters of the Sunna and creed. The Predecessors (Salaf) and the Imams of the Sunna declared many sects to be disbelievers due to just one of them, so how about when these misguidances are combined in a single sect?
I will mention some of their beliefs that were the reason for some scholars explicitly declaring their disbelief:
Their violations regarding the Monotheism (Tawhid) of Divinity.
Their belief regarding Faith.
Their negation of God Almighty's elevation above His creation.
Their belief regarding the Qur'an that it is merely an expression of God Almighty's speech.
Their negation of letter and sound in God Almighty's speech.
Their distortion of the texts regarding the Attributes of God Almighty.
Their negation of the believers seeing their Lord, Mighty and Majestic.
The details of this are as follows:
Their doctrine regarding the Monotheism (Tawhid) of Divinity is summarized in the following: