Well, it's more complex than that really.
Chances are, the phrases like that still exist, but thanks to the years that have gone by, it's all too likely that nobody really knows who Jesus is for an example. With that alone, such phrases may also fall out of use, but I wouldn't be too surprised about one being used somewhere. Everyone would know "Jesus Was Some Magic Holy Dude That Was Cool" I'm guessing, though even that may be fading away. On the other hand, there are the Elysians; angelic figures (who are actually rather snobbish) who believe in God, creator of all existence, and their own divine right to rule. And yes, they do have a holy book with stories somewhat-to-vaguely-similar to those in The Bible, but I can't recall the specifics.
Of course, this is my own understanding of it. Since it's an open plot, no need to edit it or anything of course. We'll just use Kentucky Windage and adjust as needed.