I don't think infant baptism is really baptism, & I think many real Christians were infant baptized but never actually get baptized the way they should, so I don't think a real Christian can be damned for not being baptized. Just like it's possible to be 'baptized' & be damned
Under the Old Covenant, was an [male] infant who was circumcised a member of God's Covenant people? Did circumcision only count if an adult converted to Judaism and received circumcision as an adult?
Does God's grace only apply to adults? Does God withhold His mercy and saving power from infants and small children?
If Baptism is a Means of Grace, not a work of human obedience, then what justification can there be to withhold baptism from infants and children? When in the Gospel the crowds gathered and brought their infants and children before the Lord that He may bless them, and His disciples tried to prohibit this, what did the Lord say? He not only said "Do not prohibit the children from coming to Me" He also said "For to such as these belong the kingdom".
God has always been a God of Covenant Faithfulness, a God of mercy and compassion, who does not discriminate. He is not a "respector of persons", He does not show favoritism or partiality; but since all are condemned already He shall be merciful to all impartially (Romans 11:32). For He will not withhold His Spirit from the very young of the very old, for it is written, "I will pour out My Spirit upon all people, your sons and your daughters will prophesy, your old men will dream dreams and your young men will have visions"--so that what happened on Pentecost with the outpouring of the Spirit is not for merely some, but for all; which is why St. Peter not only says "repent and be baptized for the forgiveness of your sins and you will receive the gift of the Holy Spirit" but also "this is for you and your children, and for all who are far off, as many as the Lord our God will call to Himself".
To suggest that the infant who is baptized is not really baptized isn't mere theological opinion; it is a rejection of God's own saving mercy and power and creating a barrier between God and those whom He is calling to faith, calling to Himself.
Children have always been included in God's mercy and good purpose; for He loves the little ones no less than He loves the very old. His eternal and invincible heart is for the young and the old, for the rich and the poor, for the widow, the orphan, the hungry, the thirsty, the naked, the unlearned and the learned, for the stranger, for the sick and imprisoned. He is the God who shatters walls, who breaks down barricades, and brings everlasting goodness through His eternal purposes, purposed in Christ Jesus for the whole world--that none should perish, but all have eternal life through faith in His only-begotten Son. He tore down the walls of Jericho, so also does He tear down the walls around our reprobate hearts, so does He tear down the walls that we erect when we try and discriminate against others made in His Image. All our walls, our towers, and or high places He will abolish--for He is a God whose love cannot be constrained.
The Flood Prayer:
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Almighty and eternal God, according to Your strict judgment You condemned the unbelieving world through the flood, yet according to Your great mercy You preserved believing Noah and his family, eight souls in all. You drowned hard-hearted Pharaoh and all his host in the Red Sea, yet led Your people Israel through the water on dry ground, prefiguring this washing of Your Holy Baptism. Through the Baptism in the Jordan of Your beloved Son, our Lord Jesus Christ, You sanctified and instituted all waters to be a blessed flood, and a lavish washing away of sin. We pray that You would behold (name)
according to Your boundless mercy and bless him with true faith by the Holy Spirit that through this saving flood all sin in him which has been inherited from Adam and which he himself has committed since would be drowned and die. Grant that he be kept safe and secure in the holy ark of the Christian Church, being separated from the multitude of unbelievers and serving Your name at all times with a fervent spirit and a joyful hope, so that, with all believers in Your promise, he would be declared worthy of eternal life, through Jesus Christ, our Lord."