The thread that runs through the details of Bible is evolution.
1) A nation believes that they are God’s chosen people and rest of the world is pagan. When the history unfolds, the so-called chosen people go under occupation by the so-called pagans. From this theological crisis, a new theology of a messiah (who would restore everything) is evolved.
2) When the Messiah did arrive, no restoration took place; rather Messiah himself was murdered. From this evolved another teaching that it was God’s will that Messiah should be murdered by sinners so that sinners can seek forgiveness on the basis of such a death.