That's nice, but it does not support your idea that circumcision of the heart equals born again. You have dodged it twice now....here it is again....
I believe you would have an impossible time connecting the two. What can be connected to circumcision of the heart is an attitude of the heart to follow God's ways....
"And now, Israel, what doth the LORD thy God require of thee, but to fear the LORD thy God, to walk in all his ways, and to love him, and to serve the LORD thy God with all thy heart and with all thy soul,
To keep the commandments of the LORD, and his statutes, which I command thee this day for thy good?
Behold, the heaven and the heaven of heavens is the LORD'S thy God, the earth also, with all that therein is.
Only the LORD had a delight in thy fathers to love them, and he chose their seed after them, even you above all people, as it is this day.
Circumcise therefore the foreskin of your heart, and be no more stiffnecked." (Duet 10)
God is telling you (them if you like) to do it...
Now this is in direct contrast to God doing the rebirth alone. No where in the NT will you see God telling anyone to regenerate their heart. But He does tell them in the OT to circumcise their own heart. Obviously two different things.