Your mistaken here dear friend, and your view is in contradiction to the scriptures as it is written...
"
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness" - 2 Timothy 3:16 and again "
Man does not live by bread alone but by every word that proceeds out of the mouth of God." - Matthew 4:4.
Your trying to argue that only some new testament scripture is Gods' Word for Gods' people which is not biblical.
Still none of this has anything to do with what you were responding to when I wrote earlier....
"It seems clear your understanding of God's Israel is in the flesh and not of the Spirit. We are in the new covenant now not the old but what does this mean and who do we believe and follow? That is the question."
All of God's Word are for God's people who He calls Israel. Old covenant is Israel in the flesh born of the seed of Abraham while Gods Israel in the new covenant is all those born of the Spirit through faith in the promise *Romans 9:6-8; Galatians 3:28-29; Romans 2:28-29.
This is what your not seeing.