...and by most accounts I still do. Our government cannot make any law respecting an establishment of religion. Not to say some of our politicians don't try and many of our citizens think that's fine and dandy when they do. I know plenty of Americans who insist we're a "Christian nation," think that God is mentioned in the U.S. Constitution, and an official religion (provided it is their denomination) would be perfectly reasonable.
By contrast, the U.K. is pretty darned secular at the social level yet they have an established state religion and therefore are not a secular country. Although, for practical purposes, it usually feels like it when traveling there. ;-)
I have noticed a good number of people equating atheism and agnosticism with secularism. They are not synonymous.
Secularism is simply the perspective that government has no business dictating what religion or religious beliefs, if any, its citizens should have and that religion is a personal matter. There are countless loud and strident voices of secularism among devout believers of all faiths. Doubt me, go check out
http://www.au.org/So you can be a secular atheist, a secular Baptist, a secular Muslim, a secular Wiccan, a secular Jew, a secular Pastafarian, whatever. As long as you think it's your own business and not the state's, you're a secularist. Even if your religion governs every single personal decision you make, including whom you vote for. If you think the state has no business in the religion business, you're a secularist.
You will have to look long and hard to find the extraordinarily rare atheist who sincerely believes a government that dictated atheism as the only or preferred belief to its citizens would be a good thing. So yes, atheists are by and large, secularists, but that does not make it synonymous.
Right wing pundits who foam at the mouth about the secularists destroying our country are simply telling you that Madison, Jefferson, Adams, King, Lynn and everyone else who respects the First Amendment are full of shit. It is code for "we want a theocracy." Either that or they are simply too stupid or lazy to look up the meaning of the word.
Please forgive grammar mistakes or typos. The Nyquil and chloraseptic molecules are running rampant in the blood stream.