Hello Guojing, I've never read nor heard the argument that you are making (about being "born again"), so I have a couple of questions for you.
1) What do you believe that the Lord Jesus meant by the phrase "born again/born from above" in John 3
2) Why do you believe that an Israeli living at the time of Jesus needed to be "born again" to be saved, but the rest of us do not
Thanks!
~Deut
p.s. - as for the Apostle Paul not mentioning the new birth, while it may be true that the phrase itself ("born again") is not used by him, I believe that the concept is. Also, the Apostle John used a similar phrase in his Epistles, and the Apostle Peter used the phrase "born again" in his, so being "born again" hardly seems like Gospels only/1st Century Jews only Biblical terminology. Here are a few examples.
Ephesians 2
4 But God, being rich in mercy, because of His great love with which He loved us,
5 even when we were dead in our transgressions, made us alive together with Christ (by grace you have been saved).
2 Corinthians 5
17 If anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new.
Titus 3
5 He saved us, not on the basis of deeds which we have done in righteousness, but according to His mercy, by the washing of regeneration and renewing by the Holy Spirit.
1 Peter 1
3 Blessed be the God and Father of our Lord Jesus Christ, who according to His great mercy has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead.
1 John 4
7 Beloved, let us love one another, for love is from God; and everyone who loves is born of God and knows God.