Assuming any of that is even true! But that's a discussion for another thread.
Well of course. You don't have to explain that to me, the Elder of the SciForums Atheists.
But the reason I phrased it that way is that, if you're sincere about wanting to be a Jew,
you have to believe it. It's a package deal. Even Christians who delve more than superficially into the theology of their faith (which I guess isn't most of them) have some understanding of the Covenant and why the Jews consider themselves the Chosen People. That's one of several reasons that American Christians in particular are such knee-jerk supporters of the State of Israel, the Promised Land.
Yeah yeah, Judaism is a religion of laws, not a religion of faith. (In stark opposition to Christianity, where you can be forgiven for just about any transgression so long as you apologize for it and believe in Jesus in the proper way.) As long as you obey all the laws you're making God happy--or at least not pestilence-spewing angry, which is as happy as the Jewish God ever gets--and it doesn't matter what you believe. (Assuming that doesn't conflict with one of those Commandment-thingies, which are the most important of all the laws. I've never been quite sure how that's supposed to work.) There are plenty of people who are accepted without controversy as Jewish, both by other Jews and by themselves, who are more than a little lax in their belief in the supernatural. But those are people who were born Jewish so the benefit of the doubt is in their favor. If an outsider wants to
become a Jew, he has to live up to a higher standard.
Jews are expected to raise their children to be Jewish because, given that evangelism and conversion are not enthusiastically advocated as they are in Christianity and Islam, passing it down to your children is the only way to ensure the survival of the tribe. So everyone needs to be, well, "as Jewish as possible" to prevent attrition and assimilation from shrinking their ranks. They don't want to invite a newcomer into the tribe who
already disagrees with some of the fundamental characteristics of Jewishness, and watch him proselytize that seductive heresy to their own children who are already being seduced by Gentile culture, Gentile hotties, and the increasing disappearance of Gentile hatred, which is ironically the greatest threat to the survival of a distinct Jewish people.
If you were born into a Jewish family you can become an atheist and although your family probably won't like it you'll still be counted as a Jew. But if you're already an atheist and have no plans to change, you won't find very many Jewish communities excited to take you in.