I don't . . I simply do not believe it is a future promise for earthly Israel only.
It is clearly with those to whom the Lord promised it (Jeremiah 31:31-34 KJV, Hebrews 8:8 KJV
The new Covenant is the Covenant of Grace that overcomes the sin and failure of many, many sinners, held in bondage under the Old Covenant of Works.
There is no covenant of grace. You make things up as you go along.
You have never studied Covenant Theology, so this will not fly with you, either, but others reading deserve to know you teach in error and ignorance and do not teach the one True Gospel of Jesus Christ.
We were never involved in any covenants! We were in time past 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
Ephesians 2:11 Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
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:
And unless God had a mystery concerning us, we would still have no hope! PTL, for the BUT NOW! (Ephesians 3:1-9 KJV)
Ephesians 2:13 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
PTL for the due time message that includes even us!
2 Corinthians 5:19 To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.
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1 Timothy 2:5 For there is one God, and one mediator between God and men, the man Christ Jesus;
1 Timothy 2:6 Who gave himself a ransom for all, to be testified in due time.
It's where we fit in. We don't have to steal what belongs to someone else!