Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers:
Now - `For' is certainly the true reading: the apostle is merely assigning an additional motive to Christian forbearance:
I say that Jesus Christ was, х gegeneesthai (G1096)] - 'has become,'
A minister of the circumcision - a remarkable expression, meaning 'the Father's Servant for the salvation of the circumcision (or, of Israel)'
For the truth of God - to make good the veracity of God toward His ancient people;
To confirm the (Messianic) promises made unto the fathers. In order to cheer the Jewish believers, whom he might seem to have been disparaging, and to keep down Gentile pride, the apostle holds Israel's salvation as the primary end of Christ's mission. But next, after this, Christ was sent to the Gentiles.