It is currently inconceivable that we in the West could have a government which regarded Christianity as the first and central principle of organizing life. A large majority of the population would oppose this, would indeed regard the idea as utterly monstrous.
And yet, of course, all long term stable and authoritative governments throughout history have put some religion as the first and central part of organizing all aspects of human life: politics was based-on religion.
Examples would include the Kingdoms of Ancient Egypt - which lasted 3,000 years, and the Eastern Roman (Byzantine) Empire - which lasted 1,000 year; both of which were permeated by religion in their ideals - and often in their attainment.
The idea that decent government can be attained without religion is still just an idea - since what we currently have would neither be regarded as stable nor as government by people in the past.
It is very clear now that the Western elites want to destroy their societies - one way or another; the favoured methods currently seems to include (but not be restricted to) the destruction of marriage and family, chosen reproductive sterility with an ever-ageing population, and unrestricted mass inward-migration including a high proportion of dependents and aggressors.
But at the root of this is the negative decision to dispense with religion as the unifying aspect of government - and the utter failure to find any other positive principle with which to replace it.
So the West is characterized by implacable hostility to real Christianity, and a focus on the permanent revolution of destroying the Christian legacy including inverting the transcendental Goods of Truth, Beauty and Virtue.
Since the Leftist project is in its essence negative and destructive, it will necessarily be replaced by some positive polity (at the point when the Left has so weakened the power, will and morale of the West in a particular place that some local religious group becomes by default more powerful, and is motivated to take-over). So we will get religion at the centre of politics again; the only question is which religion, and this will vary from place to place.
Trends are in place which often allow the outcome to be predicted in a particular situation; but there remains scope for summated individual choices to change the predicted outcome.
The most important political question of our day is therefore to determine which religion you, personally, would and should support as the basis of your government.
You can - of course - opt-out of the choice, and forgo even any possibility of influencing the outcome. But that is, in effect, still a choice: it is the choice to allow other people to decide which religion should be the basis of your country.
Note added: This post is focused on the decision of which religion you choose to support. This, of course, goes far beyond the scope of the adherents of a religion. It is possible (and such things have happened, quite often indeed) that a large proportion of the population support rule by religion X in preference to religion Y, despite that the adherents of religion X are only a small minority.
Likewise, given the actual available choices and trends; it may be that atheists, agnostics, and various non-Christian religions would support Christianity as the basis for government, having made the judgment that:
1. There must be a religion as the basis of government; and
2. Christianity is the best religion.
Indeed, even if there is a large and powerful Christian awakening and revival (which there absolutely must be for matters to improve in The West), for Christianity to make a difference at the worldly and secular level would require at least the consent - if not active support - of a much larger number of people than the actual Christians.
(Or, should I say, 'probably' the above; because there are unknown and unseen factors at work in the world - not least the possibility of direct divine interventions - and hope comes from the most unexpected quarters.)