The atheists have been gaining no ground on the Christians. This is because the Christians have had all the best songwriters. With songs like "Battle Hymn of the Republic," it's no wonder that the Christians really pack 'em in on Sundays. Who wouldn't want to be a Christian?
Fortunately for us Darwinists, the latest crop of Christian songwriters is the WORST crop of songwriters since the Inqusition. Their lyrics amount to little more than, "God is great, God is great, worship him, God is great." The tunes themselves have the earworm union out on strike. So all we need to do at this point is field some songwriters, even mediocre ones, and we can catch the momentum that the Christians have lost. Then WE can pack the kids into the science classes, and pretty soon, wipe Christianity off the face of the Earth.