This is what christianity is like in many European countries. It’s considered kind of an ethnic group not a belief system. I once argued with a Euro about calling non-belivers “Christians”. He claimed I was using a “no true Scotsman” arguement. I said, “OK, if Christians can be non-belivers, then vegetarians can be meat eaters.” That hits at a serious belief for them. I’ll bet it would for this woman too.
Which is the fallacy of the no true Scotsman argument, for "this fallacy modifies the subject of the assertion to exclude the specific case or others like it by rhetoric, without reference to any specific objective rule." (WP) Rather than excluding someone from being a Christian based on an arbitrary standard, excluding non-believers or the impenitent willful immoral as being “Christians” is based on the standard of the original descriptive source of that title.
I said, “OK, if Christians can be non-belivers, then vegetarians can be meat eaters.” That hits at a serious belief for them. I’ll bet it would for this woman too.
Fitting. Or calling atheists believers in Deity.