Nope, they are not free to re-define the basic institution of American (actually ALL) life.  Just like folks whose religion tells them they can stone people or sacrifice their children. (Actually not in America; can't do it here.)  And why is it that every "way out there" religious "freedom" is championed by these folks, but a business person (photographer, wedding cake baker) who simply has a biblical conviction against promoting gay marriage or a company that cannot conscientiously provide a "morning after" pill... well, their religious freedom is not a concern.