was early baptism practice really practiced for the same reasons… appealing to scriptures is problematic for it is unclear at the best of times and the years of theologizing had not taken effect… the fact remains though was the practice not done in order to wipe the slate clean of original sin? (i guess his argument could be adjusted to patristic era pragmatism?)
Again the problem is that this assertion is just not true. It is clear from the writings that the reason for infant baptism was because it was regenerative.
From CA Library
Early Teachings on Infant Baptism
Irenaeus
“He [Jesus] came to save all through himself; all, I say, who through him are reborn in God: infants, and children, and youths, and old men. Therefore he passed through every age, becoming an infant for infants, sanctifying infants; a child for children, sanctifying those who are of that age . . . [so that] he might be the perfect teacher in all things, perfect not only in respect to the setting forth of truth, perfect also in respect to relative age” (*Against Heresies *2:22:4 [A.D. 189]).
Origen
“Every soul that is born into flesh is soiled by the filth of wickedness and sin. . . . In the Church, baptism is given for the remission of sins, and, according to the usage of the Church, baptism is given even to infants. If there were nothing in infants which required the remission of sins and nothing in them pertinent to forgiveness, the grace of baptism would seem superfluous” (*Homilies on Leviticus *8:3 [A.D. 248]).
“The Church received from the apostles the tradition of giving baptism even to infants. The apostles, to whom were committed the secrets of the divine sacraments, knew there are in everyone innate strains of [original] sin, which must be washed away through water and the Spirit” (*Commentaries on Romans *5:9 [A.D. 248]).