Conservative and Orthodox Jewish movements believe that marriage should be between a Jew and Jew. Does this mean that as a Jewish American I actively lobby my government to make this the law of the land? Not at all. Instead, I take pride in living in a country that gives my Rabbi the choice of who she will and won't marry.
Conservative and Orthodox Jewish movements believe that following Kosher Dietary restrictions is an essential part of living an ethical and moral life. Does this mean that as a Jewish American I actively lobby my government to shut down all non-Kosher restaurants claiming that they violate G-d's laws? Of course not. Instead, I take pride in living in a country that gives Jewish business owners the opportunity to open up as many Kosher restaurants as they want.
The great thing about this country isn't that the law of the land follows one particular religion's guidelines. It's that it sets up a framework where we can not only coexist, but use our diversity as a strength.