JAL,
You said,
The bottom line is this. Justice entails, "The one who sins shall die" (Ezek 18). You suffer because of what Adam did. Since God is just, this implies that you are Adam. That's the origin of my view. The only reasonable way to explain this, it seems to me, is the idea of a physical Adam subdivided after the Fall to form the rest of the human race.
I think if one includes all of Ezek. 18, it would be better phrased thus: Justice entails, "The one who does not turn from his or her sin and practice righteousness shall die". In fact, Ezek. 18 implies a distinction between souls; the soul of the father as well as the soul of the son are both God's, and it is only the soul that sins (and does not turn from those sins) who will die (vs. 4). The soul of the son will not die because of the sins of his father, nor will the father die for the sins of his son (vs.20). For God to phrase it that way, it seems hard to argue for the traducianist view. It would not be contradict the traducianist view for the son's soul to have come from his father, but I don't see how the father's soul could in any way be construed as coming from his son.
A second line of reasoning would be the following: If the souls of all human beings (past, present, and future) existed in Adam, did my soul pass directly from Adam to me, or did it pass to me through all of my ancestors. And if it passed to me through my ancestors, how did their actions, good or bad, affect the portion of Adam's soul which is mine. Assuming that everyone of one's ancestors sinned themselves, and one is present in each of one's ancestors in such a way that it can be said that one is guilty of committing the same sin, then the further removed one is from Adam, the more sins one has committed. Or am I misunderstanding what you are saying? Still, regardless of whether one is guilty of only committing Adam's sin or all the sins of one's ancestors, Ezek. 18 says that if one turns from those sins and practices righteousness, God will not remember the previously committed transgressions against him; he shall live and not die (vs.21,22). To me, this is 'justice'. So often for us, we put 'justice' and 'mercy' on opposite ends of the spectrum, but that is not what Scripture does. 'Wrath' and 'mercy' are opposites. Justice is 'wrath' to the unrepentant, and 'mercy' to the repentant. "Judgment will be merciless to the one who has shown no mercy; mercy triumphs over judgment" (James 2:13).
But God has no such excuse. For example, suppose a bunch of holy angles, in heaven, are sitting around enjoying good conversation, happily. Suddenly the devil bursts in, drags them off to hell, and tortures them forever. The angels are suffering consequences of his bad behavior. But is this really appropriate for God to permit, if these angels never sinned? Justice isn't merely God's prerogative, it is His responsibility and obligation as Supreme Judge. If He allows the innocent to suffer the consequences of a perpretator's bad behavior, He is operating unjustly. He's not doing His job of executing justice.
I don't think your analogy is quite right. The devil doesn't burst in, but rather is let in by Adam, and everyone else in the room suffers for it. God, not wishing any to perish, offers His Son to redeem those in the room held captive by the devil. All have the opportunity to escape, the Son defeats the devil, Justice is done.
The cross isn't sufficient for theodicy, especially not for those (like me) who believe that many will go to hell. Why? Because some other guy, named Adam, sinned? That's not "infinite justice" but rather an "infinite lack of justice".
What is just is a metaphysic where I am Adam. If I am going to hell, it should be on account of my own sin, not on account of somebody else's sin.
As a result of Jesus' life, death, and resurrection, no one will be going to hell only because of Adam's sin, but because of one's own sin. What does happen because of Adam's sin, is that all of our earthly bodies will die. Jesus' body, made as it was in human likeness, also died. This was the first death. The second death is reserved for those who because of hard and unrepentant hearts, are storing up for themselves wrath when God comes to judge the thoughts of each one's heart.
What can be thought of as just or unjust in a temporal framework is hard humanly to evaluate. What we consider as unjust today, we may consider as just when we look back 10 years from now. Joseph's treatment by his brothers was not 'just', yet Joseph did not blame God for allowing the injustice, but later in life realized that God had used what had happened, unjust as it was, for ultimate good. Even though blameless, Job suffered at the hand of Satan, with God's permission, and for a time Job considered God to be unjust because of it. But when granted an audience by God and confronted with God's greatness, Job admitted to having spoken without really understanding how God worked, and he repented. The book ends with God restoring Job's fortunes; the impression is that God was ultimately just.
In Christ,
Russ