You keep making this false claims, without any support.
The new covenant is between the same parties as the old. That is what the Bible says, but you disagree. That's your problem.
Jer 31:31-34 (AKJV/PCE)
(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: (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: (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. (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.
Just read it and believe it. It's just crystal clear.
P.S. Note that "with their fathers" makes it completely clear WHO the LORD is talking about!
The OT is a SHADOW of what is to come. It is not the "rest of the story". Knowledge was hidden from Israel until Christ. The new covenant is for the whole world - whoever believes on Jesus Christ, the forgiveness of sins though His shed blood. He said this was the new covenant. Why do you ignore it? Paul said he was given the mystery - that the new covenant is for all those in Christ. Without the shedding of blood there is no covenant, no atonement.
Acts 17:26
and hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;
Acts 20:28
Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.
Rom 3
21 But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets; 22 even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference: 23 for all have sinned, and come short of the glory of God; 24 being justified freely by his grace through the redemption that is in Christ Jesus: 25 whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God; 26 to declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.
Rom 5
8
But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us. 9 Much more then, being now justified by his blood, we shall be saved from wrath through him. 10
For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life. 11 And not only so, but we also joy in God through our Lord Jesus Christ, by whom we have now received the atonement.12 Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned: 13 (for until the law sin was in the world: but sin is not imputed when there is no law. 14 Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam’s transgression, who is the figure of him that was to come. 15 But not as the offence, so also is the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace, which is by one man, Jesus Christ, hath abounded unto many. 16 And not as it was by one that sinned, so is the gift: for the judgment was by one to condemnation, but the free gift is of many offences unto justification. 17 For if by one man’s offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.) 18 Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life.
19 For as by one man’s disobedience many were made sinners, so by the obedience of one shall many be made righteous. 20 Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound: 21 that as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord.
1 Corinthians 10:16
The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ?
1 Cor 11
23 For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread: 24 and when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me. 25 After the same manner also he took the cup, when he had supped, saying,
This cup is the NEW COVENANT in my blood: this do ye, as oft as ye drink it, in remembrance of me. 26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord’s death till he come.
Ephesians 2:13
but now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
Col 1
12
giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light: 13 who hath delivered us from the power of darkness, and
hath translated us into the kingdom of his dear Son: 14
in whom we have redemption through his blood, even the forgiveness of sins: 15 who is the image of the invisible God, the firstborn of every creature: 16 for by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: 17 and he is before all things, and by him all things consist. 18
And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence. 19 For it pleased the Father that in him should all fulness dwell; 20 and, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven.
Heb 9
20 saying,
This is the blood of the covenant which God hath enjoined unto you. 21 Moreover he sprinkled with blood both the tabernacle, and all the vessels of the ministry. 22 And almost all things are by the law purged with blood; and without shedding of blood is no remission.
Col 2
6 As ye have therefore received Christ Jesus the Lord, so walk ye in him: 7 rooted and built up in him, and stablished in the faith, as ye have been taught, abounding therein with thanksgiving. 8 Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ. 9 For in him dwelleth all the fulness of the Godhead bodily. 10 And ye are complete in him, which is the head of all principality and power: 11 in whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ: 12 buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead. 13 And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses; 14 blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross; 15 and having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it.
Hebrews 10:29
of how much sorer punishment, suppose ye, shall he be thought worthy,
who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
Hebrews 12:24
and to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.
Heb 13
20 Now the God of peace, that brought again from the dead our Lord Jesus, that great shepherd of the sheep,
through the blood of the everlasting covenant, 21 make you perfect in every good work to do his will, working in you that which is wellpleasing in his sight, through Jesus Christ; to whom be glory for ever and ever. Amen.
22 And I beseech you, brethren, suffer the word of exhortation: for I have written a letter unto you in few words. 23 Know ye that our brother Timothy is set at liberty; with whom, if he come shortly, I will see you. 24 Salute all them that have the rule over you, and all the saints. They of Italy salute you.
Revelation 1:5
and from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us,
and washed us from our sins in his own blood,
Revelation 5:9
And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof:
for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;