The opponents of Father Brown thought that debunking the fake resurrection of Father Brown would discredit the good news of Christ's resurrection. The truth, however, is the other way around.
While baptism is a “once and for all” event that should not be repeated in the Christian’s life, the effects of baptism continue throughout the life of the believer.
The danger of denying the truth of our common human fallenness and brokenness by original sin is that the denial of this doctrine may also lead us to the denial of Christ as our Savior.