I hate to piss all over your shoes because you're an alright cat, but...
Does she self-identify as a Jew?
This is getting annoying.
If I identify myself as a Vanderbilt, do I become a Vanderbilt?
What if I think of myself as a tablesaw? Does that make me a tablesaw?
Nope, but if you self identify as a Muslim, Christian, Jehova's Witness, Hindu, Mormon, Wiccan, Satanist, Baptist, Methodist, Lutheran, Taoist, Shintoist, Catholic, Norse pagan, Greek pagan, Druid, Seventh Day Adventist, Christian Scientist, Scientologist, Voodoo, Gnostics, or whatever else, then that's what people accept you as.
And the same goes for Jews. Or let's say - Sephardic Jews, Hasidic Jews, Orthodox Jews, Conservative Jews, Reform Jews, Neolog Jews, Humanist Jews, Reconstructionist...
She's a Jew because she practices something other people agree is Judaism.
Gonna try to be as nice about this as possible...
There's a reason that there is a growing contingent of people out there who think that religion is bullshit. Nobody's stories jibe and it's all a bunch of opinions about the same thing with nothing to back it up.
1. Where did everything come from?
2. Why are we here?
3. How should we act?
4. What happens after we die?
Look at a bunch of religions and get the answer to those questions. You'll have a hoot.
And as Heinlein said so well - "One man's religion is another man's belly laugh."