I'd like to buy Dickinson a pair of Rose-colored Glasses
Wow! If this is really what Dickinson meant by this poem, I feel bad for her. I can understand that it is in human nature to doubt and wonder why does God allows these things to happen but at the same time you have to remember that God gives us all free will. It is our own free will that is the downfall. Obviously, another person's free will can negatively impact you but God doesn't have anything to do with that. As a fellow Christian, I don't understand Dickinson's attitude that God owes her something. He died for her, he owes her nothing more.
Do I agree with your well made point? Yes and No. I completely agree with you that everyone has free will to choose their actions and that these more often than not leave negative impacts on others, known or not. It's human nature to want more of something, anything. Even those who say that they want for nothing, that they have everything that they need, still want more time to enjoy that feeling of fulfillment. If it's true that God died for all Christians/the sins of all humanity, no one is left of that time. There is no one to sit us down and tell us exactly what happened as seen through their eyes. The story is a myth. For centuries groups of people have sought to repay this great debt, but it can sometimes be perceived as a stain on every soul that will never be washed clean. Bad outlook huh? Though I often enjoy playing the Devil's Advocate, this is difficult. You write that you cannot understand Dickinson's motivations, but can anyone fully respect another without walking the length of their lives in their shoes. It's Dickinson's free will that allowed her to make such judgments, if indeed they were ever truly hers.