I have never known any Christian ever say the entire test of the Bible is the words of Jesus.
As usual, atheists have no idea what is the Bible, you probably think it is a book.
BTW, "the word of God" is from the original Greek. It does not mean every word is spoken by God, but rather it information, "word" of or about God.
The Bible is available in over 2,000 languages and dialects, is the single best selling book every year and can be had free simply by walking into any church, and yet the all knowing atheist community has never bothered to even read it let alone study a commentary about the customs and traditions that shape the stories so that, like any history student, can put words in proper perspective.