No one says that Christians should not stop sharing the Gospel (that can be done outside the work that government does) . Nor is your example a point about the lowest common denominator. We are not saying go out and only do what is pleasing to a small minority. Rather we are contending that our case needs to be in thehope that a case is made for how people benefit from going with values that Godsupports. In making our argument for values and morals, arguments be included besides arguments made from the Bible. The point here is that the social contract that is a part of being in a republic requires we who are religious bring the full array of arguments we can muster and then (as you say) let the chips fall where they may.

dlb