Here is an interesting signpost of how America is changing. Up to the '70s, one heard "goddamn" in polite conversation. It might have been considered salty, but it was something adults said regularly, kind of like saying "hell." You can find the expletive in Ayn Rand's novels.
I remember being surprised in the early '80s the first time a religious man asked me not to say "goddamn." I could hardly believe this person took the idea of God so seriously as to object to a meaningless swear word. Hell, I was an atheist saying the curse. It's not like I meant "Let a supernatural creature come forth and consign thee to the everlasting bonfire!"
Today the word has become less common. I think it has joined the four-letter words as a dirty word one should not say. I take this as another indicator that religion is taken more seriously today.
Lawrence Auster objects to the use of this word in the title of a book by William F. Buckley. 30 years ago, Auster would have been dismissed as a puritanical freak. Today I fear he is the future of conservatism.