I think the choice we face is really not between religion and secular atheism. Secularism simply does not have the sustaining or moral power to stop Islam. Even now, Europe is showing us that its secular worldview is not standing up against the onslaught of Islam and is already failing.
In the end, America’s choice will be between Islam and Jesus Christ. Oh, wait a minute...Obama vs Palin. Maybe the fight is already here?
History is replete with failed civilizations that lost their moral grounding and were overrun by another that kept its moral grounding (for good or ill).