Gnostic Ambivalence
Member
Not really -- being a Jew makes one a Jew. Orthodox people look at some others and say that they are not Jews because they don't satisfy the requirements as understood by Orthodox Jews. Now, truth be told, there are some on the more extreme right of the spectrum who look at those who don't practice as they practice as "less of a Jew" but that is a figure of speech which has little meaning.
This is true up a point- people can make a decision not to be a Jew, two examples of this are the brilliant Gilad Atzmon and Israel Shamir. A child born to Jewish parents is a not a Jew as such from the time that they are born, they become such by acculturation. Something (there are a lot of other things by the way) that proves the insanity of anti-Semitism as opposed to Judaeophobia is the decision of Hitlerites that Eastern European Karaites could not possibly be of similar blood to Jews as such because they had very little if any of the history of cruelty towards their non-Jewish neighbours as their Rabbinic brothers and sisters thus sparing them the concentration camps in which tragically so many patriotic Germans died because they descended from Rabbinic Jews.