PZ Myer's wrote a comment on this clip on his blog. Check it out if you want a sane man's perspective on the issue.
The nativity scene expresses Christian's beliefs that God exists, that Christians are going to heaven, and that the rest of us are going to burn in hell for all eternity. So, why not have an opposing view?
I'm not suprised that O'Reilly is pissed about atheists expressing their beliefs. It's nothing new but this clip is special as it has my homie Dan in it. Dan da man!