Why is Infant Baptism considered to be invalid by so many Protestant denominations?

Why is the New Testament silent on Infant Baptism?

Baptist/evangelical response:

The reason there is no mention of infant baptism in the New Testament is because this practice is a Catholic invention that developed two to three centuries after the Apostles. The Bible states that sinners must believe and repent before being baptized. Infants do not have the mental maturity to believe or to make a decision to repent. If God had wanted infants to be baptized he would have specifically mentioned it in Scripture. Infant baptism is NOT scriptural.

Lutheran response:

When God made his covenant with Abraham, God included everyone in Abraham's household in the covenant:

1. Abraham, the head of the household.
2. His wife.
3. His children: teens, toddlers, and infants
4. His servants and their wives and children.
5. His slaves and their wives and children.

Genesis records that it was not just Abraham who God required to be circumcised. His son, his male servants, and his male slaves were all circumcised; more than 300 men and boys.

Did the act of circumcision save all these people and give them an automatic ticket into heaven? No. Just as in the New Covenant, it is not the sign that saves, it is God's declaration that saves, received in faith. If these men and boys grew in faith in God, they would be saved. If they later rejected God by living a life of willful sin, they would perish.

This pattern of including the children of believers in God's covenant continued for several thousand years until Christ's resurrection. There is no mention in the OT that the children of the Hebrews were left out of the covenant until they reached an Age of Accountability, at which time they were required to make a decision: Do I want to be a member of the covenant or not? And only if they made an affirmative decision were they then included into God's covenant. Hebrew/Jewish infants and toddlers have ALWAYS been included in the covenant. There is zero evidence from the OT that says otherwise.

Infants WERE part of the covenant. If a Hebrew infant died, he was considered "saved".

However, circumcision did NOT "save" the male Hebrew child. It was the responsibility of the Hebrew parents to bring up their child in the faith, so that when he was older "he would not depart from it". The child was born a member of the covenant. Then, as he grew up, he would have the choice: do I want to continue placing my faith in God, or do I want to live in willful sin? If he chose to live by faith, he would be saved. If he chose to live a life of willful sin and never repented, and then died, he would perish.

When Christ established the New Covenant, he said nothing explicit in the New Testament about the salvation of infants and small children; neither do the Apostles nor any of the writers of the New Testament. Isn't that odd? If the new Covenant no longer automatically included the children of believers, why didn't Christ, one of the Apostles, or one of the writers of the NT mention this profound change?

Why is there no mention in the NT of any adult convert asking this question: "But what about my little children? Are you saying that I have to wait until my children grow up and make a decision for themselves, before I will know if they will be a part of the new faith? What happens if my child dies before he has the opportunity to make this decision?" But no, there is no record in Scripture that any of these questions are made by new converts to the new faith. Isn't that really, really odd??? As a parent of small children, the FIRST question I would ask would be, "What about my little children?"

But the New Testament is completely silent on the issue of the salvation or safety of the infants and toddlers of believers. Another interesting point is this: why is there no mention of any child of believers "accepting Christ" when he is an older child (8-12 years old) or as a teenager and then, being baptized? Not one single instance and the writing of the New Testament occurred over a period of 30 years, approximately thirty years after Christ's death: So over a period of 60 years, not one example of a believer's child being saved as a teenager and then receiving "Believers Baptism". Why???

So isn't it quite likely that the reason God does not explicitly state in the NT that infants should be baptized, is because everyone in first century Palestine would know that infants and toddlers are included in a household conversion. That fact that Christ and the Apostles did NOT forbid infant baptism was understood to indicate that the pattern of household conversion had not changed: the infants and toddlers of believers are still included in this new and better covenant.

Circumcision nor Baptism was considered a "Get-into-heaven-free" card. It was understood under both Covenants that the child must be raised in the faith, and that when he was older, he would need to decide for himself whether to continue in the faith and receive everlasting life, or choose a life of sin, breaking the covenant relationship with God, and forfeiting the gift of salvation.

Which of these two belief systems seems to be most in harmony with Scripture and the writings of the Early Christians?

Gary Luther, Baptists, and Evangelicals

Infant baptising Protestants hold that baptism is the sign and entry into the New Covenant. They assume/hold that the Jewish boy circumcision (Old Covenant) was replaced with baptism in the new covenant. That is why they deem it acceptable to baptise babies. To answer this question we have to take one step back.

Those who hold to believers baptism(this could include children that have faith) believe:

That Faith is the entry into the New Covenant as the bible says in 1Cor 1:21-24

That the physical circumcision of the Old covenant was replaced with a spiritual circumcision, that happens when you come to faith(Col2:11/12).

That the seal of the new covenant is the Holy Spirit (Ef 4:30, Ef 1:13, Rev 9:4)

Faith is the only acceptable means into the covenant for first, second, etc generations.

That all the evidence in the early church and the New Testament show that baptism happened straight after coming to faith, and it was a testimony and image of what already happened spiritually (from death to life, and sins forgiven..).

So in summary they link salvation to faith, and they feel that baptism before faith leads to "christening" the act of making people Christians by baptism and not personal Faith.

They also believe that those practising infant baptism elevate the act to idolatry(because they open/imply a false door to salvation), where faith is the only way.