It is as if God is speaking to me! 
Well, what would it matter if they were? Is the fact that they source their values from a religion somehow damning to the values? As if, murder is illegal, so long as some God didn’t tell you so.
And in the realm of disagreement we have split churches, different faiths and lack thereof, and of course in the context you discuss different political parties.
Values come from somewhere, whether we make them up or we read them out of a book or we get them through honest-to-god spiritual intervention, wherein lies the difference?
I remember tossing a quibble or two back and forth with Jodi on the topic of whether “Christians” denoted a proper group of individuals with certain values. Unfortunately the results of that are lost to my memory so I cannot recall if I was swayed to my current opinion or whether I stand fast on what I used to hold true, but on one hand it is easy to assert that Christians are in some ways a proper group with some somewhat specific values they share, but as with any group, how the individuals practice, share, and otherwise utilize these values offer us amazing differences.
I, too, hate Christianity as it exists in popularized form, and as some fundies and some other “regular” Christians (see how I feel compelled to put that in quotes? Not a group proper) practice their system. But on the whole, if all Christians did was try to get legislation passed which corresponded in a general way to the [disputable] teachings of Christ, I wouldn’t be surprised to find all sorts of non-christians agreeing with the legislature. And I would say that about most relgions.
And, sure, why shouldn’t Christians be able to band up and try to impose some other forms of legislation that don’t directly conflict with the constitution? It is as if the very notion of their Christianity somehow lessens the value of their values in some way.
I think it is fair to say that Christians are as specific of a group as atheists are. Are there beliefs we can say that all atheists have (in the general, non-inclusive case)? Sure. Are these values somehow more proper in terms of getting legislation passed? By whose system of valuation?
Leave it for open discourse on the specific values. As for ramming actual Christianity down your throat, well, I have to put up with welfare, too, which is also supposed to be in my best interest in some vaguely mystical and non-specific way.