The Original Belief of the Hmong--Christianity?

So…I have heard two separate accounts about how the Hmong used to believe in God and worship Him alone. The first was when Pastor Somboon (Kaub) mentioned it to me in the summer of 2008. He mentioned a meeting of many witch doctors that got together and talked about how, in the past, the Hmong indeed worshipped one deity, the one true God, but have now turned aside from Him and unto idols that were given to us by other cultures. The second account was when one of the deacons at my church, Chaneng (Tsav Neej), mentioned how, before the great fall of the Hmong in the war against the Chinese, they worshipped one God and through Him, were successful in battle. However, just like Samson, they were deceived by the beautiful Chinese women and fell away in their faith. They were given over to the worship of meaningless idols, animism, and ancestral spirits. Coincidence? Or truth?