Brother @Johann, if we look at church history through the lens of a Christian historian, we can see how the distinctions you mentioned arose over time.
After the first four ecumenical councils—Nicaea (325), Constantinople (381), Ephesus (431), and Chalcedon (451)—the Church wrestled intensely with how to articulate Christ’s nature. The Council of Chalcedon declared that Christ exists ‘in two natures, divine and human, without confusion, change, division, or separation.’ While this formula became foundational for both the Eastern Orthodox and Roman Catholic Churches, it was rejected by many in Egypt, Syria, Armenia, and Ethiopia, who later became the Oriental Orthodox Churches. They did not deny Christ’s humanity or divinity; rather, they preferred the formula of one united incarnate nature of the Word (Miaphysitism), emphasising the full union without division, to safeguard against any suggestion of a split or dual subject in Christ.
Over the centuries, this theological disagreement became intertwined with political and cultural factors. The Oriental Orthodox were often outside the Byzantine imperial sphere and felt marginalized by Chalcedonian decisions imposed by Constantinople. Conversely, the Eastern Orthodox Church remained closely tied to the Byzantine state, developing its own theological traditions and liturgical practices.
Meanwhile, the Roman Catholic Church in the West, under the papacy, developed a theological framework that emphasized doctrinal precision and papal authority, producing rich scholastic commentaries that sometimes appear distant from the simplicity of Scripture, as you noted. The regional conflicts and linguistic differences (Greek, Latin, Syriac, Coptic) further deepened these divides.
Despite these separations, all these traditions share the core tenets of the Christian faith: the Trinity, the incarnation, the resurrection, and salvation through Christ. The differences often lie in terminology, emphasis, and pastoral expression, rather than in the essence of faith itself. Historical tensions aside, it is remarkable that the same gospel—Jesus Christ, fully God and fully man, crucified and risen—remains central across all these churches.
And let us not forget the prayer of our Lord in John 17:21, “That they all may be one, just as You, Father, are in Me, and I in You; that they also may be in Us.” This prayer reminds us that, beyond theological nuance and historical divisions, the Spirit calls the faithful to unity in Christ. It is a hope that transcends councils, controversies, and centuries, pointing us back to the heart of the gospel: love, communion, and shared faith in the incarnate Son.