Aslan’s entire book is, as it turns out, an ambitious and single-minded polemical counter-narrative to what he imagines is the New Testament’s portrayal of Jesus Christ. The straw-man Jesus against whom he is arguing, however, is a purely heavenly creature, far closer to the solely and absolutely unearthly Christ of the second-century heretic Marcion, than the exceedingly complex man/God depicted by the Evangelists and painstakingly developed in the theological works of the early Church Fathers.
Aslan dismisses just about all of the New Testament’s accounts of the early life and teachings of Jesus prior to his “storming” of Jerusalem and his subsequent arrest and crucifixion. He goes so far as to insist that Jesus’s zealous assault on the Jerusalem Temple is the “singular fact that should color everything we read in the Gospels about the Messiah known as Jesus of Nazareth.” Everything! Aslan goes on to assert that the very fact of his crucifixion for the crime of sedition against the Roman state is “all one has to know about the historical Jesus.” Still, as the New Testament constitutes the principal primary source for these facts as well as for anything else we can know about the “life and times of Jesus,” Aslan has little choice but to rely rather heavily on certain, carefully selected New Testament narratives.
— Jewish Review of Books » What Jesus Wasn’t: Zealot. So The Gospel narratives are a tissue of lies — until they happen to say something an author agrees with, at which point they become absolutely trustworthy.