What do Christians think about the separation of church and state?

I'm assuming that most people here are for at least some kind of separation between church and state. That is, nobody would be thrilled about a church erected with government funds, or, even more extremely, with a priest, pastor, or whatever with a government salary. If you do want that, I'm interested in your comments too, but really I'm after more subtle distinctions.

Particularly, the proper role of faith-based arguments in political discussions. For instance, suppose a pluralistic society that is about 80% Christian of some form or another, 15% no particular religion (which includes some number of atheists, agnostics, and non-religious spiritualists), and then 5% other (including Jews, Muslims, Hindus, etc.)

See here: http://en.wikipedia.org/wiki/File:Religions_of_the_United_States.png

In this environment, I would contend that arguments simply from religion are inappropriate. That religious folks are welcome to bring their religiously based values and world views to the bargaining table, but they must make an attempt to "secularize" their positions in order to give a basis for the society as a whole to follow their lead. That is, (and trying to avoid especially contentious political arguments), instead of saying, "We must protect the environment because God made us stewards of the land," the religious should say something like, "We must protect the environment because, as human beings, we are the only creatures on the planet who can."

It seems to me that limiting political arguments to only those that are reasonably secular is the only way for a society with many different religious points of view to be governed legitimately. Good secular reasons are reasons that anyone can get behind. Good religious reasons can only be accepted by those following the religion involved. And if we are going to coerce anybody to do anything (which, if we're being honest, is what the state does even at its most benign) we should at least be doing it for a reason that the coerced could in theory accept.

I should be clear that I'm not advocating any law or other enforceable standard here. I'm just laying out what I think are appropriate reasons and appropriate debating styles. In my ideal world, no one would ever say, "We must pass X law because God commands it!" and even if anybody did say that, the populace would collectively respond, "Well, it doesn't matter if God did or didn't command it, because that simply isn't a proper reason for passing a law."

So, Christians, is that okay with you? Does this kind of restriction unreasonably restrict your ability to get your political goals accomplished?