::::::::::Presumably you mean the comment of a critic - "“even the most learned and gifted of historians should observe a speed-limit” referring to a work for general readers that it was felt tried to pack too much material into too short a space, but as you see the reviewer does not doubt that Grant was "the most learned and gifted of historians". His "religious position" is irrelevant, the whole point of his book "Jesus: An Historian's Review of the Gospels" was to approach the historical figure of Jesus as a trained historian, the same way he did the figure of Cleopatra, for instance, and his position on Egyptian or Hellenistic religion was irrelevant in that case also. But as I keep saying, please, find another historian if you don't like that one who has published on the question "Was there ever such a person as Jesus?" and then he or she can be quoted in the article too.