If we are all one, which One are we?

This question expands on ’‘Are we all one?’’.

If you think we are all descended from the One—a supreme being outside of timespace and eternal—then we are all one family, are we not? But which One is our primal progenitor? Is it Yahweh; the Christian Trinity; the God of the nontrinitarian Christian sects such as the Jehovah’s Witnesses; Allah and his Prophet, Abu al-Qasim Muhammad; Brahman and so on through the list of some 3,000 supreme beings man has worshipped or currently worships? If you favor a particular One, why Him or Her and no other? How is your creation story superior to all others, and how have so many among humanity picked the wrong One?

If one of the Eastern or New Age non-theistic religions has Oneness right, which one? Why are it’s believers right and all the others with incompatible beliefs wrong? Can we even honestly say we know we are the Sky Daddy’s people, or the Daddy Sky’s people?