Asking for a sanitized version of the world doesn't seem reasonable to me, even if you get a bowlderized Baldur's Gate option. These games aren't for young people, and being Christian isn't synonymous with being against vulgarity in art. If they give you an option to censor some of the things you don't like, I'm glad you'll be able to play the game without reservation, but I don't think a conscientious person like yourself should really need that to appreciate it.
If nothing else, I'm sure somewhere down the line a modder will be able to take care of it, if Larian doesn't.
