If news consumers in the United States have learned anything in the past decade or two, they should have learned that there is quite a bit of diversity inside Islam in the Middle East and around the world. The doctrinal differences between Shia and Sunni truly matter, for example. And there are crucial divisions among the Sunni that have often caused fierce, hellish conflicts such as the one between Saudi Arabia and the tribes forming the Islamic State.
If anything, the Christian churches in this troubled region are even more complex, with some divisions dating back to the early church fathers and others having roots in the past millennium or thereabouts.
Take Iraq, for example. Even a short list of the Christian flocks in that war-ravaged land would have to include the Chaldean Catholic Church and the Syriac Orthodox Church, the Assyrian Church of the East and the Armenian Catholic Church, the Eastern Orthodox Christians with ties to Antioch and the Byzantine rite Catholic churches with ties to Rome. Yes, there are Latin rite Roman Catholics and various kinds of Protestants in these lands as well, including Anglicans.
At the moment, of course, these churches are united by one hellish condition -- persecution.