No one is saying that anyone was previously "regenerated." You have problems understanding the most simple arguments.
It is obvious that the reference is not to a "physical" rebirth, or the repetition of one's physical birth. Paul could only be speaking of a repetition of a spiritual birth. And the words that follow make it certain that the "birth" of which Paul is referring to is a "spiritual" birth--"renewing of the Holy Spirit." If a person is "regenerated" by the Holy Spirit then that means that one must have previously been born of the Holy Spirit.
I understood exactly what you said! All your presumptuous conclusions are incorrect.
1. First, "regeneration" is always in contrast to physical generation and Christ makes this very clear:
Jn. 3:66 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
7 Marvel not that I said unto thee, Ye must be born again.
So your presumptuous and false idea that "re-generation" demands a previous birth of the Spirit is absurdly false and irrational because that would mean that every infant is born of the spirit but produces fruits of sin by nature he is born with as sin is OMMISSION or coming short of the glory of God and anger, wrath, stubborness, deception are all fruits of the flesh not of the Spirit.
2. Regeration is equal in scripture to new birth and thus you are demanding TWO regenerations; new births while ignoring that Christ contrast the new birth with the physical birth and thus a "re-generation" but from above not from beneath.
If it takes a corrupted nature to explain the behavior of children then how do you explain the sin of Adam and Eve, neither who were born with a corrupted nature?
Again, Adam sinned reprsentatively and did so by CHOICE whereas infants WITHOUT CHOICE prove Adam represented them in his sin because they sin BY NATURE!
Your teaching makes the Lord Jesus out to be born spiritually dead because if we are born that way then so is He since He was made like us IN EVERY WAY:
"For this reason he had to be made like his brothers in every way, in order that he might become a merciful and faithful high priest in service to God, and that he might make atonement for the sins of the people" (Heb.2:17).
Again, Jesus was not "made" man by conception in connection with a human father but by the Holy Spirit. Adam is the FATHER of the human race and the sin nature is passed down through the FATHER not the mother.
The virgin birth is predicted in Genesis 3:15 because the savior would be the "seed of the woman" without the involvement of a Father in contrast to the seed of Eve and every woman after her whose seed were conceived by a father.
Again, sin is also by OMMISSION or to "come short of the glory of God"
Do infants who routinely manifest unjustified anger, wrath, deception, stubborness toward those who love them (parents) come short of the glory of God in these things?
From whence do these attitudes originate? Do they originate as fruits of the flesh or the fruit of the Spirit?
If they are not born with such a nature then from whence does it originate? Does God express such a nature? Can such attributes be found in God?
Why is it these things come naturally without training but must be restrained by discipline if such things are not part of the nature they are born with?