[af_vet_1981]

Apparently, Jewishness is about neither religion nor race. Unlike a race, you can get in, but unlike religion, once you’re in you can’t get out. As with Achan, once you are a part of this people, you are the entire people. As Israel is eternal, so your bond with them is irreversible, unbreakable and eternal.

[jjotto]

Yes, essential Jewishness (even for a convert who was sincere at the time) is irrevocable. One may forfeit being treated as a Jew, but the children of such a female is Jewish, and should such a person return to religious observance there is no need for conversion.

Government laws such as in the US and Israel are irrelevant to essential Jewishness.