I didn't even touch blue laws or anything that might support them, nor did I say anything about religious people's happiness trumping atheistic people's happiness. I don't know where you got that, Andir. Blue laws are pretty damn stupid if you ask me, but hardly anyone enforces any of them in the U.S., and even when they are, it's normally stupid little things like "don't buy this or that on Sunday." They're just like any other old arbitrary law; no one cares. Second, the prayer-instead-of-hospital-care was referring to a situation in which someone who isn't hurt, but has custody over a hurt person (mother + badly injured child), not allowing medical treatment on that person, and instead only praying. Looking at my post I could have worded that better.
While Leafsnail brought up a good point with the British government, I believe that would fall under what I previously mentioned - causing harm (not only physical harm, mind) to others with religion or lack thereof as incentive to do so.
Now, as for derail, Smitehappy is pretty much right. Anything that tries to prove god/gods exist is going to have some negative feedback from portions of the community, which I saw coming and thought to try to cool down by pointing out the futility of trying to convince the other side to the opposite theological view. Instead, a post attacking religion by mentioning at one point something that has nothing to do with what I was talking about comes up. I'm here to neither argue for religion nor against atheism, but to try to tell you that the idea from those two that opposes your own is not there to insult you. It's just there because someone likes it. You don't have to like it, but that doesn't mean that badgering people about what they believe is a good idea.
As a side note, I believe the president is sworn in on his religion's respective major document, assuming he has one. I think we have yet to encounter a situation where the president has no religion, but don't quote me on that part - I'm a little hazy on most presidents; I really only know those with the biggest historical roles - but I would assume they would be sworn in on a copy of the constitution or something like that.