Tenchi seems unaware that all scripture testifies of Christ, and Christ being the messenger of the Covenant brought the same Covenant to all people.By the way, Jeremiah 32:40 isn't talking about the New Covenant. Understood in context, it is a promise God made specifically to the OT Israelites:
Jeremiah 32:36-42 (NASB)
36 "Now therefore thus says the LORD God of Israel concerning this city of which you say, 'It is given into the hand of the king of Babylon by sword, by famine and by pestilence.'
37 "Behold, I will gather them out of all the lands to which I have driven them in My anger, in My wrath and in great indignation; and I will bring them back to this place and make them dwell in safety.
38 "They shall be My people, and I will be their God;
39 and I will give them one heart and one way, that they may fear Me always, for their own good and for the good of their children after them.
40 "I will make an everlasting covenant with them that I will not turn away from them, to do them good; and I will put the fear of Me in their hearts so that they will not turn away from Me.
41 "I will rejoice over them to do them good and will faithfully plant them in this land with all My heart and with all My soul.
42 "For thus says the LORD, 'Just as I brought all this great disaster on this people, so I am going to bring on them all the good that I am promising them.
How you mistook verse 40 for a promise to New Covenant, Gentile, born-again believers, I just can't understand. In context, it's so obvious God is speaking to His Chosen People, the Israelites, it seems to me impossible to miss. But miss it you did.
John 5:39 Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me.
Ephesians 2:12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
13 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us;
Tenchi claims to have taught people for a long time. ( the Pharisees and they in the law interrestingly beieved they did the same.)
Romans 2:7 Behold, thou art called a Jew, and restest in the law, and makest thy boast of God,
18 And knowest his will, and approvest the things that are more excellent, being instructed out of the law;
19 And art confident that thou thyself art a guide of the blind, a light of them which are in darkness,
20 An instructor of the foolish, a teacher of babes, which hast the form of knowledge and of the truth in the law.
21 Thou therefore which teachest another, teachest thou not thyself? thou that preachest a man should not steal, dost thou steal?
22 Thou that sayest a man should not commit adultery, dost thou commit adultery? thou that abhorrest idols, dost thou commit sacrilege?
23 Thou that makest thy boast of the law, through breaking the law dishonourest thou God?
24 For the name of God is blasphemed among the Gentiles through you, as it is written.