only to those who repent of their sins and follow Christ....do any of the promises of redemption apply.
to the others.......read Romans 1 again.
If you continue reading in Romans 3 you will see that only faith is necessary for salvation, not "repenting of/from sins". That is a misunderstanding of "repent". The object "of sins" (for metanao/repent is never present is the salvific forumula. That is added by editors or by translators pushing another gospel (NLT).
Let me continue with Romans 3:
25 Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God; 26 To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus. (Romans 3:25-26)
"faith in his blood", and "the justifier of him which believeth in Jesus." No mention of "repentance of sins".
The bible does not contradict itself. The omission of "repentence of sin" as a condition for salvation is not a mistake or an inconsistency. Repentance is a "change of mind", away from trusting in ones own works to save him (i.e. turning from sin) and instead trusting in the finished work of Jesus Christ, and thus entering into his rest and ... salvation.