@marinerscatch and
@JaumeJ This verse is applicable to this discussion as you emphasize so strongly the words of our Savior. I would suggest you not do so to the detriment of your own well-being and learning.
2 Timothy 3:16-17 King James Version (KJV)
16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
17 That the man of God may be perfect, thoroughly furnished unto all good works.
The red letters in your Bible are not
all scripture, it is a part of scripture. The apostle Paul's words are also too a part of scripture. Consider both, and do not toss one out. They both are of importance.