don,
per belief, shaminism doens't support the idea of god--yes and no. the reason why most people feel that shaminism doens't support god is that per mong, the idea of "laig/teev hawm" and "worship" are two different concepts. mong believes that every spiritual entities are respectable equality, and you should "honor" them. however, as for "laig," then we are only required to laig "niam/txiv thiab ncej dab ncej qhua" xwb. but, we could still "laig" the rest of the outside spirits...ther e is no rule to say we have to or we cannot.
however, in terms of god, there is a supreme god who is consider the "giver" of life for the life cycle to complete---yawm saub. now, if we were to compare this yawmsaub to "god" of the bible, theye are totally different from one another in their purpose and nature. if you look at mong from the perspective of a chistian, then mong doens't have a god....but if you look at mong from the perspective of a mong, then mong "hawm/teev/laig' many entities...but there is only one supreme giver of life....so i na way, mong do have a god.
keep in mind that sivyig is not consider a god, but only a healer....not a god. plus, no one is teev/laig/worship siv yig except tus "txiv neeb"....
yaweh