Ruby456,
Don't mistake my words as implying that others do not derive their culture from religion. My words also don't imply that we don't sometimes arrive at the same spots, Christians, atheists, and Jews (though rarely). The manner we travel can differ highly nevertheless.
Our brief conversation here may illustrate how difficult it can be to explain a non-Western concept to someone who has only been exposed to Western ones influenced by Christianity (in this case likely the "black-and-white" compartmentalization of Jehovah's Witnesses). A secular Western society built upon and/or having emerged from Christian culture can differ from that of a culture built upon another religion. If that other religion is not based on adherence to a creed or beliefs, how is "secularization" defined? How would you do it?
In Christian based-cultures secularization gets defined by a lack of belief or faith. Those who "go through the motions" but do not "believe" are not considered good or authentic Christians. When one does not mentally assent to the creed, one becomes "faithless," and technically that usually spells a loss of religion.
In Jewry one's belief has no salvific value nor ensures or denies membership. Jews can have all sorts of beliefs and can even reject certain standards of Judaism (Reform Jews, for instance, don't accept the concept of a coming personal Messiah). Humanistic, Reconstructionist and Jews that claim atheism have no "belief" in God but can still clearly practice the religion: lighting candles and reciting prayers on Shabbat, holding a Seder on Passover, etc. Zionism is totally "secular," so to speak, but it is founded on concepts from the Jewish religion.
See what I mean? What is "secular" has to be defined by something totally different when belief, creeds, and faith do not play a part.
To conclude, there is the example of one of my best friends, Wally. Wallace is an atheist, born into an atheist family. He never practiced any religion (except for perhaps "worshipping" Richard Dawkins for a short time...until he saw "militant atheism" backfire in his home state of Louisiana and then Dawkins started saying things like God "probably" doesn't exist--Wally, really lost a hero there for a while). Today Wally practices Buddhism, and we get along fine. Oddly, however, Wally didn't immediately recognize that his "anti-religious" stand was being violated by himself. Buddhism, as you know, is a religion but it doesn't actually involve the worship of deities (though some debate this). After a bit of self (soul?) -searching, Wally came through this, still practicing Buddhism where it adds meaning to his life.
But I found it odd, in the end, how he was terrified about "coming out" to his family as gay. There has been no religion in his family for a few generations. All of them are atheists. Still, he had misgivings, had something inside him that made him feel it was wrong to not be heterosexual, and we had many talks about this for almost 6 years before he was able to come out to his family. (They weren't surprised and were totally accepting.) Today he has a great husband and is raising a family (with a mixture of Buddhism tossed in). Wally is a great example of the questions of what makes a religion, a religious person, what defines "beliefs," where secular does and/or doesn't mean, and an example of crossing or blurring lines.
So what I've been saying is that there are perhaps more questions than definitive answers.