At least Catholics and Orthodox believe that God is a Holy Trinity. The situation is very different in Islam.
What bothers me greatly is that the Orthodox Church in Constantinople preferred to live under the yoke of Islam rather than the yoke of Catholic Rome. That decision had consequences. That is why Hagia Sophia is a museum today rather than a great Christian Cathedral. What kind of rock was Hagia Sophia build upon?
“What kind of rock was Hagia Sophia build upon?”
The Rock of Peter’s Faith, the kind that suffers 700 years of Islamic oppression and still survives and grows. Rome’s reaction to a century of modernism is compromise and surrender to the demonic spirit of the age.