Jonah, while I ordinarily prefer conspiracy theories, I’m betting this one is pretty benign. “One nation under God” is a good phrase and it’s consistent with the GWB we’ve come to know over the years. Adding “indivisible” would make for an awkward-sounding ending, unless you also add “with liberty and justice for all” … at which point it begins to sound more like the Pledge than the ending of a short speech. I’d be surprised if there were more to it than that.