I agree that the west has turned its back on Christianity and will reap the results of that rejection.I completely agree. Things are falling apart because the foundation has been rotting. I do think there's other, more rational, nonreligious world views which would allow a functional society of "decent" people to exist in the west though. Something better than what's around now.
Assuming the world isn't going to end too soon from now, most people aren't going to return to being religious, and more and more people are going to leave religion(all of which seem like reasonable assumptions), wouldn't you agree?
Other nations are also turning to Christianity and already missionaries from some of these nations are appearing in the west.