This may emphasize that people still trusted God in spite of Cain and his ungodly family.
Musing about my devotionals with My Lord and Saviour Jesus Christ. Romans 5:1-2 (NKJV) Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ, through whom also we have access by faith into this grace in which we stand, and rejoice in hope of the glory of God.