Why did St. Paul believe that Jews and Gentiles could both share in God’s salvation?

St. Paul the Apostle believed that both Jews and Gentiles could share in God’s salvation because he viewed faith in Christ as the sole requirement for justification, rather than adherence to the Jewish law.

Paul argued that all humans are enslaved by sin and that neither Jews nor Gentiles could achieve salvation through their own efforts or by observing the Law. Instead, he taught that through baptism and faith in the crucified Lord, individuals are "justified"—made right with God—and become one person in Christ.12

By framing faith as the universal means of salvation, Paul removed the necessity for Gentile converts to adopt Jewish practices, such as circumcision, which had previously served as barriers between the two groups. Consequently, he concluded that in Christ, there is no longer a distinction between Jew and Gentile, as both are equally eligible to become heirs to God’s promises through the same act of belief.12