Yes agreed, there were a lot of studies done on the bible its origins and authors, its undisputable that it was written by several authors in several different historical periods (Including new testament).

Problem with bible is that people clam it was divinely inspired - written by god through human hand. Well it is clearly not. But all it really is a tool in hands of extremists justifying their evil deeds. That's how you have 'thou shall not kill' but wanting all gays to be killed etc.