Continuing the theme from chs. 9 and 10, Paul is saying the Gospel of Jesus Christ extends the offer of salvation from Hell to all men, both Jews and Gentiles. Even though the majority of Jews have rejected the Gospel, there will always be a remnant among them who will become born again Christians (v. 5). Personal, individual repentance and faith remain the conditions for election and salvation; and personal impenitence and unbelief the conditions for reprobation (vv. 7-10). God still has a plan to save Jews by Christ (vv. 28-32). So, Gentile Christians should not be prideful over against the Jews (a warning against antisemitism); especially because Christianity branched off of Judaism (vv. 17-24).