Based on the available evidence, it would be more honest, academically, to say there is some uncertainty about the historical Jesus.  There is a great leap of faith to go from the consensus (among Biblical scholars) that he existed to all the claims associated with Jesus, including the miracles, his divinity, and his intention to found a religion.  Beyond the certainty among most modern scholars that Jesus was baptized (by John the Baptist) and crucified by the Romans there is plenty of disagreement about all the other details of his life.  That ought to be a red flag, considering all the miraculous events the Gospels claim happened in his lifetime.