Morality

[Angrboda]

The need for a "sky god" theory falls apart for me with religions like Buddhism.

It's worth noting that the Buddha was agnostic about questions regarding the afterlife and gods and such, and so his teachings were in a sense rather secular. To suggest that this makes the sky god theory fall apart seems to indicate only an unfamiliarity with Buddhism and an innocent attempt to characterize Buddhism as sufficiently similar to the sky daddy religions that the lack of such in Buddhism proves a flaw in the sky daddy theory, rather than a flaw in your analogy between the two. It's worth noting as well that later Buddhist movements did add sky daddies, miracles, and the supernatural to Buddha's original teachings, so it's not at all clear why this shows a failing of the sky daddy theory. A largely secular movement was supersized with sky daddies and such. That seems to endorse whatever you are referring to by the sky daddy theory.