"A reference to God is not taboo in any culture that I know of,"

Actually it is. Several religions have "the-real-name-of-god-that-is-never-spoken-or-written" with an accompanying set of "euphemisms" that are traditionally used, unless I've been misled by the looney toones sectsists who've told me that.

In most cases, I've found that none of the speakers knew what the "blasphemous" name was, since nobody ever told them, but ... ...

John