don't forget the Zoroastrians and the African Pagans, they could also be thinking about adding the possibility of making Celtic and Classic Pagans as while, despite what many think, Some people professed publicly at being Christian and privately continued to worship the old ways.(It should be stressed that this is rare, and little documented) A Prof. (Historian) and a Priest, told me that in reality Europe wasn't completely Christian(Catholic or Protestant, Orthodox) until well into the 17th-18th Centuries and in his opinion maybe even in the 19th century.)