It has become common now to speak of Judaism, Christianity and Islam as constituting three forms of “Abrahamic faith”. I have not been able to nail down just when this term was first used. (To use another term of current interfaith politeness, this may be due to the fact that my Internet skills should properly be dated BCE—“before the common era”.) I have the impression that it came to be widely used in America in the wake of 9/11, with the altogether admirable intention of countering anti-Islamic hatred. In that it is similar to the term “Judaeo-Christian”, which originated...