Christ died on a cross, killed by the very people he was sent to teach.
Was that a necassary part of the atonement? If so, how so?
What I am asking is could Christ have done whatever it was that he did in Gethsemane(taking upon himself pain, sin, suffering, and other forms of affliction), and then lived a long and happy life in the countryside, to die of old age, and then break the bands of death and be resurrected? Could he have suffered the injustice of being the Son of God, only to then be run over by a careless drunken charioteer?
Is it possible that just as his infinite atonement covered all manner of sin, it also covered all forms and manners of death?
Are there any components you consider essential to the manner in which Christ died? (Must he have been hated? Did he need to be sinned against in death? Did he have to be betrayed?)