I'm also sorry if I was focusing on the United States too much, but that's where I live and therefore have the most opinion about it.
One thing that I've noticed over the good few years I've been frequenting international English-speaking websites - a good many people all over the world are quite concerned with our politics and the general mass-mindset of our citizens. And probably with good reason...
I want to know what you think of this 15 year old high schooler's opinion.
I think you're pretty mature on this subject, and you seem to be pretty even-minded about it. There's quite a bit of atheism-outing going on in our country right now, and I think it's a good sign. Not because we're out to eradicate religion or anything - but just because atheism has been such a taboo for so long. By a long step, the highest-ranking non-theist in our government is a lone Congressman out of several hundred. I think that is clearly not so much that all of them are theists in practice, but that they all know it could easily cost them their position if their true thoughts on the subject were known, not because of any official "religious test" in our Constitution, but because the vote itself for so many is a religious test.
Religious tolerance to a high degree is required, nearly anywhere you go, simply because there are so many religions and denominations within religions that it is truly impossible to get everyone to agree on any one religion. That is precisely the problem that brought about our founders' dedication to separating church and state. A man might feel like it is his duty to god and to his fellow man to make an official church, but he realizes that this will open up the path for another religion to seize control and force him to practice a religion he does not agree with.
In the US, Christianity is undeniably predominant. Something close to 90% of all Americans, depending on which study you peruse, claim belief in some god or another. Over 80% claim Christianity. Probably quite a few less than that go to church regularly. The solid fundamentalists make up about 30% of our voters, and something around another 20% are at least in part influenced by Christian fundamentalist ideas.
This is something that will change - not quickly, but gradually, as it becomes more socially acceptable to profess atheism.
So... How bout that Rachmaninoff? Anyone?
Weren't we talking about that on another thread? :p