Although both sides would like to believe they can eventually wipe out the other, its clear that liberals and evangelicals need each other in order to survive:
Liberal Christians create the public space for religion which fundamentalist Christianity needs in order to exist.
Fundamentalist Christianity creates controversy, which politicians address by giving more public space for liberal Christianity - which they see as the antidote to fundamentalism.
Of course the same is also true for other religions, not just Christianity.
