I have already proved that this verse is speaking about the physical descendants of Abraham, Isaac and Jacob but for some reason you cannot even understand this simple thing:
"Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel, and with the house of Judah: Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the Lord: But this shall be the covenant that I will make with the house of Israel; After those days, saith the Lord, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people. And they shall teach no more every man his neighbour, and every man his brother, saying, Know the Lord: for they shall all know me, from the least of them unto the greatest of them, saith the Lord: for I will forgive their iniquity, and I will remember their sin no more" (Jer.31:31-34).
There has never been a time when all of the physical descendants of Abraham, Isaac and Jacob plus all of the Gentile converts to Judaism had their sins forgiven.
This has has never happened and the preterists have no place for its fulfllment in the future.
No one argued that is all circumstances that all of the physical descendants of Abraham will be counted as true sons. On the other hand, it is a fact that some of the physical descendants are counted as true sons.
It is also a fact that those who will receive the promise of the New Covenant at Jeremiah 31:31-34 are either the physical descendants of Abraham, Isaac and Jacob or Gentile converts to Judaism who have been circumcised. There has never been a time when every single one of those people have had their sins forgiven.
The fathers of those who will receive the promises under the New Covenant are described this way:
"Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt" (Jer.31:32).
Not only are the "fathers" of those who will receive the blessings of the New Covenant the physical descendants of Abraham, Isaac and Jacob but it is clear by their actions that they couldn't be described as a so-called "spiritual Israel":
"They have turned aside quickly out of the way which I commanded them: they have made them a molten calf, and have worshipped it, and have sacrificed thereunto, and said, These be thy gods, O Israel, which have brought thee up out of the land of Egypt" (Ex.32:8).
Now it is time for you to dig in and actually try to understand what I have said and to look at the evidence I gave to support what I said.
Then I will ask you a question. Do you see that those of the house of Israel and of the house of Judah were all the physical descendants of Abraham, Isaac and Jacob (except for the Gentile converts to Judaism)?
Quote whichever passage from that chapter that you want and then give me your interpretation of it. I will be more than happy to address it. But in the meantime answer my question.
Thanks!