“That Christ’s vicarious sacrifice for our sins was the central element of the gospel that Paul received on the Damascus road may be inferred from his persecution of the Hellenist Christians. Even [J. D. G.] Dunn agrees that the Hellenists rejected the Jerusalem temple out of their belief that Christ’s death was the eschatological atonement that ended all sacrifices. After seeing the crucified Jesus as vindicated by God on the Damascus road, Paul joined them. It would be most unnatural if Paul had failed to see the appearance of the risen Christ as a confirmation of their belief. So we will have to conclude that at Damascus Paul accepted their kerygma that Christ died for the sins of humankind.”
Seyoon Kim, Paul and the New Perspective: Second Thoughts on the Origin of Paul's Gospel (Grand Rapids: Eerdmans, 2002), 49.