Originally Posted by tk102
"There is no God!" -- he says that pretty forcefully and you can't get much more atheistic than that. I saw no indication he was anything but atheistic through the movie until the end.
Look at any of the flashbacks... he clearly believed in God before the outbreak of the virus. Therefore, his shift at the end was a return to his previous beliefs.
But I agree, people shouldn't base their opinions off of his religious beliefs.