It was from the IGN press release videos.I didn't see that anywhere, was it in images I've missed?
Also I do think Celtic Christianity is always a constantly revisited topic in terms of the extant of its existence so it's not a big deal really.
I got it from the IGN videos. I am vyshan on the PDX forums btw.No, it's in a forum post summarizing and detailing what we currently know about the game's tenets and religions.
The tenets of Insular are: Monasticism,Vows of Poverty, Pastoral Isolationism. Pastoral Isolationism makes them righteous to other christian faiths. Insular also has polygamy.