Two things.

First, your authors are all 100 years after the fact. That's okay, but still. it's not like they had news clips to refer to...

Also, Jesus spoke in parables. It was the style of the day. It would not be unreasonable for Jesus Himself to be a created parable based on a real person. It was how they wrote. What was more important than the personal details of Jesus Himself? Go the extra mile, turn the other cheek, love thy neighbor, do unto others...