Then there can be no new covenant. Either Jeremiah is a false prophet or God is a liar. Take your pick.
Heads I win, tails you lose.
bugkiller
Let's look at the terms of the new covenant.
Jeremiah 31:31 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:
Right away here's a problem for the people saying "I'm a gentile, that doesn't apply to me". The promise was to Israel and Judah only, no one else.
Jeremiah 31:32 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:
Jeremiah 31:33 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.
The promise is to put the law in people's hearts so they follow it better, not to discard it, see Ezekiel 36:27 and Ezekiel 11:20 for the same promise.
Jeremiah 31:34 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.
Has this happened yet, do all people know God today? We don't have to teach anyone this? Why do missionaries exist then?
Jeremiah 31:35 Thus saith the Lord, which giveth the sun for a light by day, and the ordinances of the moon and of the stars for a light by night, which divideth the sea when the waves thereof roar; The Lord of hosts is his name:
Jeremiah 31:36 If those ordinances depart from before me, saith the Lord, then the seed of Israel also shall cease from being a nation before me for ever.
Jeremiah 31:37 Thus saith the Lord; If heaven above can be measured, and the foundations of the earth searched out beneath, I will also cast off all the seed of Israel for all that they have done, saith the Lord.
Here's a problem for the replacement theology types that say God is done with Israel, here God promises as long as nature itself is functioning he will not cast them off or that they will cease to be a nation.
Jeremiah 31:38 Behold, the days come, saith the Lord, that the city shall be built to the Lord from the tower of Hananeel unto the gate of the corner.
Jeremiah 31:39 And the measuring line shall yet go forth over against it upon the hill Gareb, and shall compass about to Goath.
Jeremiah 31:40 And the whole valley of the dead bodies, and of the ashes, and all the fields unto the brook of Kidron, unto the corner of the horse gate toward the east, shall be holy unto the Lord; it shall not be plucked up, nor thrown down any more for ever.
And of course here we see a future prophesy of God bringing Israel back to their land, and we know this wasn't fulfilled by the return from Babylon since they did get plucked up in 70 AD. It is still coming, it begun in 1948 and will be complete when Jesus comes back to establish his kingdom.
Again, has this happened yet? Do all people know God, and do Israel and Judah have the law written on their heart?