You say: “A Jew is whoever possess Jewish culture”. And what is ‘Jewish culture’ one may ask? How much of that Jewish culture one has to possess in order to be considered a Jew? What about gentiles who are a scholars in Jewish history, Bible and tradition are they Jewish?

The questioning of ‘who is a Jew’ comes mainly from secular quarters. Many find the whole religious experience meaningless and seek to redefine Judaism on secular terms. That’s fine. People are free to call themselves whatever they like, but that does not transform then to that which they call themselves. As it happens being a Jew has its roots in a religious tradition. For better or worse we are stuck with it. Anything else is ‘like Judaism’; ‘good enough Judaism’; ‘sort of Judaism’; - for some - but not Judaism.

This questioning of 'who is a Jew' came from religious quarters, as well. In any case, just because a culture is deeply religious in nature, doesn't mean that one has to be religious in order to stay a part of it, to develop it.

I agree. Indeed the majority of the Jews, in Israel and elsewhere are not religious. I was merely questioning the assertion made earlier in the discussion that having absorbed some Jewish culture qualifies one as a Jew.