I was VERY surprised to hear vampire Barnabas say, "Oh my God!"
He does that a handful of times, and it always seems 'wrong' somehow, how I'm not sure... In DS theology, someone can be cursed, which seemingly includes being cursed in relation to God, being denied any favor from Him, being denied Heaven, yet the curse is made by an evil character with no input or approval from God. That just adds to the tragedy of course.
You could say it's very big of Barnabas to think of God still, even in an automatic figure of speech, when God is to Barnabas... what? Irrelevant? Since He's omipotent, can He be blamed for turning His back on a cursed being? One who's trying to make amends?
Sorry, I know this kind of thing stirs up hornet's nests, but it's a great big elephant in the living room, and I can only ignore those for so long.