The only real difference between the 'Christian Church' and the 'Church of Christ' is that the former uses musical instruments in their worship, while the latter prefers to sing a capella.
This spoke against everything Luther had come to understand about the gospel!
Though many look to Luther’s posting of the 95 Theses as the beginning of the Reformation, there were many significant individuals God used who would appropriately be referred to as pre-reformers, e.g.
Here is Luther’s preface to this monumental work: Out of love and concern for the truth, and with the object of eliciting it, the following heads will be the subject of a public discussion at Wittenberg under the presidency of the reverend father, Martin Luther, Augustinian, Master of Arts and Sacred Theology, and duly appointed Lecturer on these subjects in that place.
He requests that whoever cannot be present personally to debate the matter orally will do so in absence in writing.