Ṣāliḥ bin 'Abd al-Quddūs of Persian origin was born in Basra, the crossroad of religions and teachings with its socio-cultural, scientific and intellectual structure. He grew up in a family that values religion, politics and literature. Rich scientific background and cross-cultural integration of Basra significantly influenced his scientific and intellectual development. However, in historiographical sources, he is an intellectual who has come to the fore with his literary identity, His 'sectarian', 'political', 'wise' (ḥikami), 'didactic' and 'gnomic' poems form the main theme of his literary writings. Various titles have been attributed to him by the authors of history and biography. "Master of poets, street preacher, storyteller, theologian and philosopher" are a number of them. Before the translation of philosophical works, he became one of the important representatives of the 'literary theology', the dialectical technique of the period. Thus, besides his poetic and literary identity, he is mentioned as one of the six theologians of Basra. Over time, he was able to attract the attention of the political power with his theoretical and literary works for both theo-political and social adjustment. However, he was not understood adequately, and his poems did not attract the necessary attention since philosophical/wise expressions were widely found in them. In his poems, it is possible to see every tone of hope and hopelessness. He reflects hope, rights, justice, equality, freedom, moral virtues, but more often; despair, death, transience of the world, ascetism and distancing from people. For this reason, he is also referred to as the "poet of despair." From this point of view, his call to the life of ascetism was interpreted as dualism. The opinions of Ṣāliḥ calling for social adjustment, justice and equality were perceived as a threat by the political authority and he was killed with the accusation of heresy. Although it is generally accepted that he was executed due to heresy, there is much speculative information about the subject. Of two examples are that he subjected to ethnic discrimination due to his Persian origin, and that he was a philosopher of dualism and a follower of Manichaeism. However, the reason for the murder of Ṣāliḥ was neither his theological choice nor ethnic origin. His poetry, which motivated social morality, intellectual development, freedom and social enlightenment, turned him into a threat to the political power. It would appear that his opposition to Arab nationalism and privilege in the ranks of Šu'ūbiyya, a populism movement and his demand that justice and equality should spread throughout all layers of society, caused political prosecution. In this process, the rule chose the easiest way to silence any opposing voice by implementing the accusation of heresy. The concept of heresy, especially with the Abbasids, quickly turned away from its religious concerm and changed into a political notion. As a result, academic discussions conducted at the scientific and intellectual level in Basra were moved to a practical arena by politics, and the dose of criticism and violence increased. First of all, with its scientific and bureaucratic elements, the state embarked on an intellectual and actual struggle with heretical teachings, which aims to distort the essential principles of Islam by dissimulation (taqīyya), Although this political attitude towards heresy, which aims to break down Islamic values, can somehow be considered reasonable, the area of accusation of heresy expanded in time; causing every opposing movement to be evaluated within this scope. However, when the main theme of his poems is examined, the first point, attracting attention is his call to believe in God, the truth of the hereafter, reckoning consciousness, responsibility, justice, equality, freedom, etc. In fact, referring to the Qur'ān and ḥadīth in his poems already proves that he was a Muslim, Nevertheless, his poems were sometimes interpreted and presented as an evidence of his heresy and whenever he was found stating the right, his statements were found invalid because of accusation of dissimulation. Considering all these facts, this article will make a logical consistency analysis of the information and narrations about Şâlih, It will also examine the validity of the accusations of heresy against him, based on his literary discourses, religious identity and political attitude, As a result, it will determine whether the negative (theological) attribution to him is really an accusation or truth by an analytical inference. [ABSTRACT FROM AUTHOR]