I guess it's less about looking like one, and more about feeling like ones. I can tell an adult that God is fake, to their face, and feel nothing. Not the case with kids. I like kids. And I know they're going to grow up and realize that God is just as real as Santa Claus and the Easter Bunny.
Or they won't. Maybe they will be religious for their entire lives, and when they become adults, and our paths cross again, then I'll be a cunt to them.