The resigned mind in Islam?

Is the Trojan Horse a valid explanation for the phenomenon of the resignation of reason in Islam? In other words, can the mouths of Arab-Islamic rationalism be attributed to an external invasion by hordes of irrationalism, including Hermeticism, Gnosticism, “Eastern” mysticism, Sufism, esoteric hermeneutics, illuminationist philosophy, and all the other currents of the ancient heritage, which together constituted the “other” for Islam and which gradually, and in a hidden manner, swept the arena of the Arab-Islamic mind until they pushed it out of its orbit and plunged it into the night of a long era of decline?
Al-Jabiri, by adopting here the theses of a particular school of Orientalists, and thereby projecting onto Islam the history of the Church’s struggle with pagan Hermeticism, heretical Gnosticism, and mystical religions, and finally with Neoplatonism, which represented the last line of defense for Greek rationalism, is practicing in the arena of Arab-Islamic culture a kind of internal Orientalism captive to a dual centrality, both Western and Christian.
This fourth part of “Critique of the Arab Reason” not only attempts to restore the prestige of rationalism The ancient heritage not only addresses the absurd myths woven by Al-Jabiri, based on a heap of cognitive errors and fallacies about “Alexandria as the home of Hermeticism,” “Aphamea as the stronghold of Gnosticism,” and “Harran” as the wellspring of Eastern mysticism. It also attempts to answer the following question: Did the resignation of reason in Islam come about as a result of an external factor, and thus be hung on someone else’s coat rack, or is it an internal tragedy governed by intrinsic mechanisms, in which the Arab-Islamic mind bears responsibility for its own dismissal?