If I'm not mistaken Oakland County Michigan, where I live now and grew up, is one of the most densely populated Jewish areas in the world. I think the question of what is a Jew is a good one.
All of the Jews I know, including my two best friends, are sensitive to antisemitism. I'm thinking it must be a heritage thing or something because honestly they're all terrible fucking practicioners of Judiasm. Not a single one has been back to Temple since they were mitzvah'd. Their families don't properly celebrate or observe any of the Jewish holidays. In fact, they're entirely athiest. So is it more a heritage thing and less a religious thing, overwhelmingly? I suppose it might depend on the audience.
You'd think that Jews and Blacks would get along better since both have been so persecuted as a people. However, the official status report from Detroit is that overwhelmingly neither wants anything to do with the other.
It seems that people just can't get along these days!
Brad