It’s meant to combat many of the specious arguments put forward by Christian apologists against atheists, agnostics and the humanist movement. I imagine it’s going to provoke some pretty interesting conversations and comments across the news channels.
I think their message would have been a bit smarter if they had targeted all gods. The aim is squarely at the Abrahamic religions (though that is the dominant flavor around here).
Regardless, how does one live without religion?
Pretty damn easy.