Nothing new here. It’s called “scientific Bible criticism.”
I taught the Bible as literature for a while, and had to read a ton of that stuff, although I found little use in it.
Basically, it began in German Universities back around 1870, when Bismarck was attempting to exterminate Christianity (especially Catholicism) so he could modernize the State. But it permeates almost all academic Bible study today.
First, the above difference is not significant as they claim
Next, they are apparently using sources a millennia later to dispute a text? That would be like quoting some monk in 900 AD as authoritative on events that took place in 30-90 AD, nearly a 1000 years earlier.