[PrayingMantis]

Being Jewish is more of an ethnical definition than a pure religious one, for many different and complicated reasons. This is why one can relatively easy be a Jewish and a non-beliver. However, this distinction will not work very well when applied to Crisitianity, since Chrisitianity is first of all a matter of belief (and then, maybe, other things and social defintions and such), at least, this is how it is originally.

As a matter of fact, pure belief plays a relatively small part in Judaism, as opposed to Christianity. Judaism is much more about belonging to a certain group, and doing, constantly, what you must do (especially so for relgious people, of course). Questions of belief, that are very common with regard to Christianity, play a completely differt role, and are not "visible" (I don't have a better word) as in Christianity.