Jesus isn't real.
The person named "Jesus" did exist. But his divinity is the most controversial.
Well, in the power vacuum of the fall of the Roman Empire, where pagans and the early Christians were at war, the church think of an idea how to manipulate the people, thereby entitling Jesus as the "Messiah" and having miraculous powers.
Jesus is real, but his divinity isn't.
I believe you are correct-- and I think also that Christianity is just like a mythology that may have had some real people in there. I agree with your point about the war and people saying some normal guy was the "Messiah," but maybe this Jesus person was a very nice person who may have been a good example for the kind of religion they were creating.