This is wrong, Abraham and all others Christ died for, or would die for, were by His death reconciled to God while enemies. This is Legal.
Right, it's legal. Reconciled as a result of being in Christ. Foreknown by the Father (OT faith), predestined to be "in Christ" by faith per Romans 8:28-30. It's a predestination from OT faith to NT faith in the Gospel. All that the Father gave Jesus, His sheep, true OT believers, will come to Him and believe. Only in Christ was Abraham saved, Jesus is the way, the truth, and the life. No man comes to the Father but by Jesus.
Romans 3:25-26 whom God set forth as a propitiation by His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed, to demonstrate at the present time His righteousness, that He might be just and the justifier of the one who has faith in Jesus.
It's faith in Jesus that places us, and Abraham in Christ. This is only good after the death resurrection and ascension, when the ingredients were there for that spiritual union to save us. .
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.
Romans 6:3-11 says the same thing. It's the result of being 'placed into' Christ, that we die with Him, and are raised up with Him, born again. Atonement only applies in Christ.
That Spirit baptism, available after Pentecost, is what places a believer in Christ. (1 Corinthians 12:13).
With the Spirit of God in us we have Jesus, and He has us. Without the Spirit of God in us, He doesn't have us, and we don't have Him. And we don't have life. Romans 8:9-11, which also says the same thing as Romans 5:10 with more context.
Also, in the OT, we see even those who had faith in Jesus did not yet have the life (Spirit indwelling), not until Pentecost.
John 7:38-39 He who believes in Me, as the Scripture has said, out of his heart will flow rivers of living water." (born again) But this He spoke concerning the Spirit, whom those believing in Him would receive; for the Holy Spirit was not yet given, because Jesus was not yet glorified.
It's the same thing John 3 says. When Jesus is lifted up (glorified), the OT believers who died having not receiving the promise of the Father Hebrews 11:39-40) could finally ascend, Abrahams bosom, Paradise, with Jesus. John 3:13-14. And be with the Father, reconciled.
I understand this is time consuming answering all these posts, but please consider what I'm saying as it answers your question head on, and completely, with Scripture.
Dave