If you don't believe Jesus was a real person than why believe that anybody who lived years ago was real?

because you have history books that tell you about this person? Whose to say they're not just made up stories? That's what atheist like to say about Jesus after all, he wasn't real and the bible is just a made up story...any of you ever meet Darwin in person? He probably never really existed either and his theories and life are just a big fabrication.