Mathilda wonders whether swearing soul-friendship with a Pagan would upset the Virgin.
"Rudi didn't say that no Aspect of the Lady would cry about people swearing friendship; it wouldn't be tactful." (p. 186)
But he does tell her that, in Ireland, people continued to swear the oath after they had become Christians. The tame Church of the Protectorate would probably oppose this friendship between heirs on merely political grounds.
Rudi has two bases for ecumenism: tact and the phrase, "the Lady." Wiccans say "Lady." Christians say "Our Lady." If everyone avoids the word "Goddess," then it might be possible to agree on Aspects of the Lady?
I am convinced that there is a reality that is described by myths and that we can see truth in each others' myths. When I visit a Church Hall where there are posters about God and sin, I think of oneness and alienation.