Turretinfan's recent post on the separation of Church and State reminded me of this quote from John Calvin:
Compel them to come in. This expression means, that the master of the house would give orders to make use, as it were, of violence for compelling the attendance of the poor, and to leave out none of the lowest dregs of the people. By these words Christ declares that he would rake together all the offscourings of the world, rather than he would ever admit such ungrateful persons to his table. The allusion appears to be to the manner in which the Gospel invites us; for the grace of God is not merely offered to us, but doctrine is accompanied by exhortations fitted to arouse our minds. This is a display of the astonishing goodness of God, who, after freely inviting us, and perceiving that we give ourselves up to sleep, addresses our slothfulness by earnest entreaties, and not only arouses us by exhortations, but even compels us by threatenings to draw near to him. At the same time, I do not disapprove of the use which Augustine frequently made of this passage against the Donatists, to prove that godly princes may lawfully issue edicts, for compelling obstinate and rebellious persons to worship the true God, and to maintain the unity of the faith; for, though faith is voluntary, yet we see that such methods are useful for subduing the obstinacy of those who will not yield until they are compelled. (link)
That's a bit scary. Baptists have some loose ties back to Ana-Baptists, who understood the separation of church and state issue better than the reformed churches.