@Timjer #183928
Because they’re convinced that the United States alone can spearhead the Christianization (and capitalism imbual) of the world, between its might and somehow being chosen by God for that. (Probably from constantly thinking of the Puritans as the starting point, rather than the Jamestown factory.) Also a sense that one’s loyalty is always to one’s ancestors; to be one’s own person, which I suspect heading elsewhere would strike them as, would be high treason.
Of course, they probably don’t see a “proper” theocracy to dwell in anywhere (either too Muslim or too black, I’m guessing). So, they’d reason, they might as well start building that “proper” theocracy here.