[4][5]Roger Smith suggests that "Jesus H. Christ" is a specifically American profanity, and indicates that at least in his experience it is uttered primarily by men.
Thus Quinion writes: Its long survival must have a lot to do with its cadence, and the way that an especially strong stress can be placed on the H. You might also think of it as an example of emphatic infixing that loosely fits the models of words like abso-bloody-lutely or tribu-bloody-lation.
[7]Similar remarks were made by the linguist Dwight Bolinger, who mentions "Jesus H. Christ" in a discussion of the strategies used by English speakers to add additional stresses to "highly charged words" for purposes of emphasis.
The symbol, derived from the first three letters of the Greek name of Jesus (ΙΗΣΟΥΣ), is transliterated iota-eta-sigma, which can look like IHS, ΙΗϹ (with lunate sigma), JHS or JHC ("J" was historically a mere variant of "I").
For how this learned-sounding abbreviation could have served as the basis for vulgar slang, Smith offers the hypothesis that it was noticed by ordinary people when it was worn as a decoration on the vestments of Anglican (i.e., in America, Episcopal) clergy.
[12] The "Harold" may arise from a common misinterpretation (often by children) of the phrase in the Lord's Prayer, "Our Father who art in heaven hallowed be thy name."
"[11] The term is considered offensive by some, most notably within Christianity, where most denominations view Jesus as part of the Trinity and consubstantial with God.