The Hmong world is a second generation world. Our origin--the origin of the clans and, thereby, the Hmong family--started with Nkauj Iab & Nraug Oo. These were the orphans who survived the great earthly flood. They were the only survivors of the great flood. So they mated. Their incest gave birth to a gourd that they later sliced into pieces of flesh. Those pieces were thrown onto valleys and hills and other places. As they turned into human forms building fires, cooking breakfast the next day, the clans were named after them. The piece that got thrown towards the fence became the Vaj (Vang). The pieces that formed a family at the goat house became the Lis (Lee). And so forth.
That was the time the Hmong clans, and so the Hmong family had ever been formed with our current system.
I say it's a second-generation world because Nkauj Iab & Nraug Oo's existence clearly indicated they had parents and a world that got flooded before their gourd was born--before the clans were formed, and so before the Hmong system came about.
Remember also the rich at that time built metal containers to shield their families and so they stayed at the bottom.
Those special details indicate a world before the clans were formed.
Now, as the orphans' canoe floated towards the bottom of the sky, the Gods heard the wobbling sounds of the canoe beating against the corners of the sky. The Gods opened up the gate of Heavens and ordered their soldiers--most likely the lightning--to strike down and poke holes onto the Earth so that the flood would drain out.
That's what happened in the tale.
That, too, indicates there were and are Gods the Hmong have believed in. What God or Gods that was or those were is unclear. So, the Hmong have come to think only of the sky as our God. "Muaj ntuj nyob saud, muaj av nyob haud" goes the saying. We rely on this prayer towards a divine source of superpower to do punishment to crooks and to give us justice. That's religion.
So, who is the Hmong God? I think it's the sky!