Now, as far as atheists are treated, I'm lucky to not have had many of these experiences MYSELF, but atheists are often treated as such. (Helps I was born and raised in NYC.) But as for how religion affects the world, he's pretty spot on.
(My only gripe with this analogy is the presents-giving portion of the Santa story. Do the people in this Santa-loving world actually GET magical presents under their trees? He never addresses that bit. But there's no such equating quality in god-belief (ie: believers don't actually get magical presents from god once a year either), so I guess it's okay to gloss over that bit.)
Anyhoo, I thought this was cool and wanted to share!