as if Matthew, Mark, Luke and John have priority.
“Red letter Christianity” is a liberal notion. That one part of Scripture deserves greater emphasis or takes precedence over another is a lie from Satan.
“All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, thoroughly furnished unto all good works.” (2 Timothy 3:17)
All Scripture, not just those red letters, is the very Word of God. Christians don’t get to pick and choose which ones we like or decide which parts have priority.