Is the entire sum total of all Christian thought completely limited to the questions of "Did Jesus die for our sins? Yes. Did Jesus stay in the tomb? No. That's it, discussion over, that's 100% of everything we need to derive from the Bible!" I think you and I would both agree that this is not the case. Even if every Christian denomination agrees on these two incredibly general and vague points, there are glaring and irreconcilable differences between them when we get into the questions of...
I didn’t say this is the entire sum of Christian thought, though arguably it’s the most important facet of the scriptures.
Why did Jesus die for our sins? What does it mean that He died for our sins? What did dying for our sins accomplish? Why is it important that He died for our sins? Why did Jesus have to die, instead of an angel or the Father dying? Would any other person have done? If so, why? If not, why not? If Jesus died for my sins, does that mean I can keep on sinning? If Jesus died for my sins, then what does it mean in terms of my own salvation? Do I need good works to truly accept Jesus' gift of salvation?
I’ll take them up in order. Hopefully it will help:
Why did Jesus die for our sins?
We’re imperfect and so cannot save ourselves (cannot be citizens of a perfect utopia on our own—we’d ruin the utopia).
What does it mean that He died for our sins? (He substituted for us, as a Christian on the Titanic was offered lifeboat space and gave it to a lost person. He switched places with us.)
What did dying for our sins accomplish? (See above.)
Why is it important that He died for our sins? (See above.)
Why did Jesus have to die, instead of an angel or the Father dying? (The Bible contains clear exposition on these things. Jesus is above all angels. Jesus’s death is an immense contribution. Jesus died so that the Father could place Him above all except the Father.)
Would any other person have done? If so, why? If not, why not? (All other persons are imperfect sinners with finite worth.)
If Jesus died for my sins, does that mean I can keep on sinning? (The Bible plainly says that all persons who trust Jesus certainly do sin. If they say they are NOW sinless, they are lying and Jesus isn’t within them in a meaningful way.)
If Jesus died for my sins, then what does it mean in terms of my own salvation? Do I need good works to truly accept Jesus' gift of salvation? (The Bible is clear that salvation is a gift of God NOT of works.)
You may think these questions superfluous, but they actually become immensely important. For example, the Gnostics agree that Jesus came to earth, died for our sins and rose from the dead, but their interpretation of what that means is so far outside of how Christians interpret it, that Gnostics fall outside the pail of Christianity altogether because of these differences in how we view the world, God, life, death, sin and ourselves. So no, it's not enough to agree on one or two points and say "Yes, Jesus died for our sins and rose from the dead", because beneath the apparent similarity of our beliefs is a myriad of difference that makes our respective faiths mutually irreconcilable. For example, Calvinists and Catholics could never be one, because of how Calvinists and Catholics view sin, man's free will, the purpose of Jesus' death and Resurrection, and God's sense of justice. Our faiths fundamentally differ, even though we agree on a few commonly-held Christian points.
That is the point I'm getting at. "Just reading the Bible and using the Bible to interpret the Bible" doesn't cut it for keeping a common Christian faith. We need to have another measure, outside the Bible, for assessing the worldviews, beliefs, why's and how's through which we interpret the Bible. Nobody, and I mean nobody, ever "just reads the Bible". There is ALWAYS layers upon layers of subjective interpretation that goes into our reading and understanding of it.
EDIT: I'll add that writers also have layers of worldviews, beliefs, values and ideas through which they operate when writing a text. The only way we can ever be sure that we're interpreting the Bible correctly is if we know all the layers of culture, linguistics, beliefs, worldviews, values and ideas from which the author operated. If we have these layers, then we can know how the authors of the Bible actually intended their books to be read and understood.
Thank you for raising these issues. I would include the gnostics in the cultic belief groups I mentioned earlier. The Bible plainly says Jesus died for sin—you’re not disagreeing with that—which underscores the nature and tenor of all the questions you raised—so a group that says, “Jesus did not die for sin” is obviously adding a non-orthodox, cultic, INVENTED belief that is nowhere in the scriptures.
And I’m not denying that you and I bring many layers of subjectivity and judgment to our reading of the Bible. I am denying that someone dealing with reality, not wanting to manipulate themselves or others for the pursuit of sin or cultic power, can read the Bible and misinterpret it (like gnostics). I’m denying that a thinking person can read the Bible without concluding Jesus is said to have died for all the sins of all people.
We’ve could have had this conversation:
*The Bible in modern form is a collection of books, bound inside cloth covers.
*No, it’s not—books are subjectively different things. You must realize you need to prove what a book is using objective tools before you say the Bible is really, truly a book or available at bookstores.