And right after he said that, the Jews all rejoiced, knowing that Jews and Gentiles were now one body, blessed with all spiritual blessings in heavenly places in Christ. And that the covenants God made with Abraham and David weren't really all that important after all.
And they all lived happily ever after. The End.
What is our great commission? Do you know it and where to find it?
And BTW: what about those 12 thrones and Paul? Does he need to bring a stool to sit on in the Kingdom?
IIRC some of the epistles written by Apostles came Before 70 AD and some after. Once Titus destroyed Jerusalem the surviving Christians had fled the Romans and this insured that the surviving Apostles went into ‘all the world’ with message. Until the Roman armies surrounded Jerusalem the Apostles were huddled there. Paul was out on mission trips.
Is it your answer then, that the gospel of Grace was first preached in Acts 3 by Peter?