[Yaelle]

If they don’t follow Judaism, messianic Jews are not Jewish. (Of course they might be born Jewish, that’s different). But they do follow Christianity, so they are by default Christian.

The most famous one who proclaimed himself the messiah was excommunicated from Judaism. He might be the only guy who ever was?

[RegulatorCountry]

“Christian” came after, Jesus and followers were Jews. Not very popular with other Jews, true.

[af_vet_1981]

If they don’t follow Judaism, messianic Jews are not Jewish.

No; Jews are born of a Jewish mother. If Jews do not follow Judaism, they do not follow Judaism; it may make them secular, less observant in some areas to Orthodox Judaism, or a convert to another religion, but it does not make them not a Jew.

Judaism is Orthodox (period). All other flavors are modern inventions that go to varying degrees against Halacha (Jewish law), sometimes to see what they can get away with. Reform accepts almost anyone as a Jew. Conservative accepts women as rabbis when they are not rabbis, and accepts homosexuals as married when they are not married.