One point Bart Ehrman brings up in his book on the existence of Jesus is the fact that many modern scholars deny that the earliest Christians believed Jesus was God.
“That the earliest Christians did not consider Jesus God is not a controversial point among scholars. Apart from fundamentalists and very conservative evangelicals, scholars are unified in thinking that the view that Jesus was God was a later development within Christian circles…It is striking that none of our first three Gospels—Matthew, Mark, and Luke—declares that Jesus is God or indicates that Jesus ever called himself God…Jesus is not called God in Q, M, L or any of the oral accounts that we can trace from the synoptic Gospels.”
And Jesus said, “I am, and you will see the Son of Man seated at the right hand of Power, and coming with the clouds of heaven.” Mark 14.62 (ESV)
Jesus before Caiaphas
Jesus was making an overt, unmistakable claim to be deity—he in fact was the one who rides on the clouds. That this is no exaggerated interpretation is evident from Caiaphas’ reaction:65 Then the high priest tore his robes and said, “He has uttered blasphemy. What further witnesses do we need? You have now heard his blasphemy.” (ESV)
The statement is only blasphemous if one is claiming to be the rider on the clouds. That idea may have been acceptable to Jews at the time, but it was simply intolerable that this man Jesus of Nazareth would claim to be the incarnation of the second power. What most of us might think is an odd answer, or even a deliberate deflection of Caiaphas’ demand, is the exact opposite. Jesus could not have been more blunt. He was the “second deity” of Daniel 7.
So then, we have both the authors of Mark and Matthew portraying Jesus as attributing to Himself an Old Testament deity title for YHWH and originally Baal in the context of the climactic turning point of the Gospels. As Heiser says, "The description is recognized as an official title of Baal. No angel or lesser being bore the title. As such, everyone in Israel who heard this title associated it with a deity, not a man or an angel." Ehrman is wrong when he says the earliest Christians didn't consider Jesus God.