What believers are doing here is trying to draw an historical figure out of a mythology because they got it backwards. It's not uncommon for myths and legends to develop about an historical figure, but it takes religion to draw an historical figure from myth. It's rather humorous to see the comparisons with Augustus. Another thing believers don't realize is that ancient rulers established a divine right to rule by linking themselves with gods, it was a means of keeping the peasants in their place, to accept their lot in life. Mythology has Jesus born among ordinary people wherein only the Magi knew of his divine right to rule, but in mythology stories like this are told in order to set the plot, all of which is completely lost on the believer.