To those interested in this thread ...

I think that the custom of baptizing infants grew out of a mis-application of Jesus' saying that "unless you are baptized, you cannot enter the Kingdom of Heaven".

And then we mis-applied the idea of an 'original sin" and all the rest. Eventually leading to a need to create a doctrine of 'Limbo' to solve the self-created problem of innocent children not going to either heaven nor hell.