[B.I: 1]

There is no beginning to this story.

If there was, then it would be larger than human comprehension and full of assumptions, which is unneeded. You might say that the beginning would be the birth. Others may stay the very start of the universe. But this story, no, we start in the end.

For why start at the beginning? To give a sense of Sympathy for the characters in the story? To give a justification for their actions?

No, I will not start at the beginning, I will start at the end.