Distinguish again between image of God, children of God, adoption, those indwelt by creator, God’s law written on the hearts of all men… who is a child of God? And what does that mean ? Is it only those who are justified ? And can you lose it ? If only applicable to Protestant Christians, do you believe those not “saved by infant Lutheran baptism” are also children of God?
To be anti universalist , we must say though all are created by God, those without faith, are not children of God?
Also, if a child baptized, but not very faithful and doesn’t subscribe to Christianity in their life at all, are they still “children of God”