That's an interesting perspective. Does it imply democratic establishmentarianism - i.e. the majority voting for the establishment of religion and being happy to see it endorsed (that still presumably leaves an unhappy minority, who still want to celebrate Christmas/not baptize their children, even if only a small percentage of the population)? Surely that wasn't what the Westminster divines had in mind, as monarchists - the king was supposed to establish the true religion and the people had to fall into line? Biblically, in the OT wasn't that usually the case with reforms - they came from a godly king, not a democratic vote of the populace (look at Josiah for an example)? And should it be a tolerant establishmentarianism (the government supports the true religion [as it understands it] but tolerates dissenters) or an intolerant establishmentarianism (the government persecutes those of other denominations)? Just trying to clarify exactly what kind of establishmentarianism you have in mind, and therefore how it relates to OT examples.