God in the public square

In the course of our discussion of Glenn Beck, Mormonism, and civil religion, Another Kerner raised a question that is worth our consideration:

A sincere question or two may be called for here:

What groups and/or events, of a semi-political or political nature may Christians attend in order to bring about the return to a constitutional republic without demanding doctrinal purity or spiritual accord with all others in attendance?

May we recite the Pledge to the flag with others not of our own Confession?

I am well aware of the profound differences between some Christian denominations and others….. and certainly am conscious of the origins of Mormonism and know what must be rejected….and my family also has a considerable working acquaintanceship with the American “civil religion”, so called.

If the two kingdoms are confused, tyranny often results…no argument from me.

But folks, what political action committees, ad hoc committees, and/or organizations (aside from the two primary political parties), and what rally or event may Christians join or attend in order to gather together with others who are working to preserve freedom?

As mentioned elsewhere, it is going to take more than confessional Lutherans in the body politic to secure continuned religious freedom: and it is certainly going to take more than confessional Lutherans to hold back the onslaught of the Turks.

She alludes, quite learnedly, to the invasion of the Turks during the Reformation, something Roman Catholics, Lutherans, and the Reformed worked together–putting their own disputes on temporary hold–to turn back.

The doctrine of the Two Kingdoms teaches that God is the King of both realms.  Is there a way to acknowledge His reign in the earthly sphere without lapsing into a “civil religion” that usurps the revealed faith in His spiritual kingdom?