Hi–maybe I can help a little. The search for the so-called “historical Jesus” has been going on for about 150 years. That was when various scholars began to write biographies of Jesus. Perhaps one of the earliest was David Friedrich Strauss. He and other scholars of the new historical school claimed the bible was full of myth and therefore scholars needed to study it to find the real, the historical Jesus buried under the layers of myth. All sorts of methods have been used to try and tease out the true historical Jesus, including textual study, etc.
Opposed to this, of course, was the Jesus of faith–the one people have believed in for the last 2,000 years.
Martin Kahler wrote a book called “The So-Called Historical Jesus and the Historic Biblical Christ” in 1896 which argued that you cannot separate the Christ of faith from the Christ of history. It was very influential but has not done anything to stop the unending search for the real, the historical Jesus by scholars who don’t believe in the Jesus of faith.
I’d be glad to give a more detailed explanation if you like,’’
God bless, Annem