If you dig to deeply, you may find there never was a Jesus. Outside of the bible there really is no evidence. The works of the historian Josephus are contested and doubt has been cast on their validity,particulary his references to Jesus. The bible says when Jesus was resurrected the dead arrose from their graves and walked about. Dont you think an event like that would be recorded in secular history if it really happened?
I don't disagree with that, however even among non-believers, (such as Dawkins, although he is not an expert in this field), the general consensus, is that he did exist. The question seems to be more of, "who was he?".
j