Some of these beliefs sound similar to those of the Yezidis, a non-muslim sect with maybe 1 million followers in Iraq. The muslims say the Yezidis worship John the Baptist.
Actually, that's incorrect.
The Yezidis are the Kurdish "devil-worshippers." They believe God and the Devil had a fight, but eventually Satan recanted and wept. God, being forgiving as he is, took mercy on him and made him Lord of the Earth. Thus, the Yezidis do not pray to God (who is so merciful no one can offend him), but instead pray to Melek Ta'us (the Peacock Angel / Satan) since he is the one who's wrath and judgement they must avoid. Their holy book is the Mes'haf i Resh, or "Black Book."http://altreligion.about.com/library/faqs/bl_yezidism.htm
The Iraqis who worship John the Baptist are the Mandaens. They are the only living Gnostic sect left in the world, unless you count the numerous New-Age christian sects that are every other on the list on google.com