Don’t know why this is an issue. Of course born again Christians can sin. It’s human nature.
Not according to the “Born Againer” club.
That’s a big club.
Surely you mean a subset thereof; right?
Ask them why James (5:16) says to Christians, “Confess your sins to each other and pray for each other so that you may be healed.” John adds (1 Jn 1:9), “If we confess our sins, He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness.” Shouldn’t be necessary if Christians can’t sin.