Millennials, in particular, consider themselves to be spiritual, but they're not necessarily going to anybody's church. It's not like the world is becoming hardcore, Richard Dawkins-atheist, but people are looking to sort of synthesize science - people love science, especially the millennials.
The religious geniuses of all ages have been distinguished by this kind of religious feeling, which knows no dogma and no God conceived in man's image; so that there can be no church whose central teachings are based on it. Hence it is precisely among the heretics of every age that we find men who were filled with this highest kind of religious feeling and were in many cases regarded by their contemporaries as atheists, sometimes also as saints. Looked at in this light, men like Democritus, Francis of Assisi, and Spinoza are closely akin to one another.
God knows, I'm not the thing I should be, Nor am I even the thing I could be, But twenty times I rather would be An atheist clean, Than under gospel colours hid be Just for a screen.
Then there are the fanatical atheists whose intolerance is of the same kind as the intolerance of the religious fanatics and comes from the same source.
Existentialism isn't so atheistic that it wears itself out showing that God doesn't exist. Rather, it declares that even if God did exist, that would change nothing.