Have you heard of the red-letter Christians? They're a liberal evangelical group that behaves as if only the words of Jesus Himself are "inspired", therefore the only enforcable Christian practices must derive from the gospels themselves.
On a similar note, several years ago there were a couple of Catholic FReepers (inactive now) who expressed their beliefs that the Apostle Paul was mentally ill. They did not trust modern interpretations of his epistles, but more to the point, they expressed doubts that any of Paul's writings were inspired by the Holy Spirit, and they did not understand why the Catholic Church had conferred sainthood upon him.
Never heard at all of the “red-letter Christians”.
I have noticed that the newer Bibles do not have Jesus’s words “red-lettered” which shows the importance of all of the scriptures are inspired.