If Christianity is true, why were there so many different beliefs about Jesus in its early history?

There were many branches to early Christianity and each Early Christian Church e.g. The Church of Alexandria, Antioch, Damascus, Jerusalem, Rome, Lyons, Corinth, etc was independent from every other church. Each and every church had its own bishop or leader, its own scriptures, its own theology. For the first 300 years of Christianity, there were different churches, different Early Christian Groups, etc. As Bart Ehrman said "The Early Christian church was a chaos of Contenting beliefs. Some groups of Christians claimed that there was not one God but two or thirty. Some believed that the world had not been created by God but by a lesser, ignorant deity. Certain sects maintained that Jesus was human but not divine, while others said he was divine but not human". So for the first 300 years of Christianity there was no "Orthodox" Christianity. Everyone had their own beliefs about Jesus.