Much of Paul's argument in Romans is to refute the perspectives of the School of Shammai and their perspectives and rulings on the Gentiles. It's in this era that concepts like Gentiles keeping the Noahide Laws developed. But even these interfere with God's plan and Israel's mission to the Nations. The Remnant of Israel, which Paul defines as those who have accepted Yeshua as Messiah have a mission to be a Kingdom of Priests and a Light to the Gentiles. It's a mission that can breakdown if Shammai is embraced.

https://www.restorationmessiah.com/media/7qhdbm3/romans-29-role-of-the-remnant-10-14-17