A Hmong shaman told me she has visited the Native Americans and that the Native Americans practiced shamanism, too, and that, because of that, they were Hmong.
I didn't confront the shaman because I wanted to respect her and didn't want her to feel ignorant, especially when she claimed to also be psychic and a seer and clearvoyant.
Bottom line though is this: there are many people in the world who practice shamanism and charge bride prices and hold long weddings, etc. The African Ogani culture in Nigeria and some other parts of Africa are black but practice similar traditions to the Hmong. Bride price, negotiators, spirit-calling ceremony to welcome the newborn and to name the newborn, etc. Are they Hmong? No.
The cultures that do these things are mostly the cultures that are still very close to nature. The Hmong are not the only ones who are still close to nature. We know today that the Hmong are the groups in southern China to certain parts of Southeast Asia many who are now in the West. We can't even find enough similarities in them to unite with them. How are we to claim the Native Americans as Hmong? They are Sioux, Iroquois, etc. Any of that Hmong? Is any of their words Hmong word? No.
We do not have enough commonality to be Native Americans and vice versa. We can't say the few we know of are enough to make us Native Americans or make Native Americans Hmong. That's not enough. And, FYI, the Native Americans do not buy into the theory that they migrated across the Bearing Strait. That theory was coined by the White Americans just so the Whites could say that this continent was never originally owned or inhabited by the Native Americans. That way, the White Americans would have more rights to make it theirs--like making everyone immigrants so that whoever is more powerful can take over. But the Native Americans don't agree that they came over from Asia. For them, the only place their ancestors have ever known since the beginning of time is this continent. And if you think more about this claim, you will agree with them. If they had crossed over from Asia, there would not have been so many of them at a time when technology wasn't that great yet. What is now Mexico and what is now Canada and what is now the United States were full of Native Americans in different tribes.