Then why the practice? Shouldn’t baptism be a choice? For instance, if someone is baptized, then grows older and converts to the Islamic faith are they still saved? Can you force an infant to be a Christian through baptism? For that reason, shouldn’t it be a choice someone makes when they are the age to make that choice? I mean that is what Jesus did. He was not baptized as a child.
Circumcision is the OT type for baptism. Col 2:11-12 Baptism is the fulfillment of the covenant sign of the OT. Surely you would agree that New Covenant fulfillments are more inclusive and have greater efficacy towards salvation than the OT precursors, correct?
Circumcision was a covenant sign, and a child inability to assent does not change that the child belongs to God.
There is no exclusion of infants spelled out in the Bible, and in fact, at least two times in Acts we find that entire “households”, or “families” were baptized. I think it is reasonable to assume that households included children. Jesus also made a point to say that we were to bring the children to Him. Do you think that all of these children were age of consent? In Mt. 21:15-16 we see that they are “infants and nurslings”. At Baptism we bring our children to Christ; we promise to teach them to know, love and serve Him. Later on they receive their Confirmation, when they make the conscious decision for themselves, that they believe what they have been taught and will live their lives for Christ.