A Messianic Jew is a Jewish person who believes that Yeshua (Jesus) is their Messiah. Some people think that a Jewish person who believes in Jesus is no longer a Jew. But what could possibly be more Jewish than believing in the Jewish Messiah, Yeshua?
Sounds as if the Messianic Jews consider themselves Christians, too.
That isn't what I meant. By using the term "fundamentalist", one conjurs up an image of a Bible thumping evangelist who takes every word of the Bible literally. Being a Christian or believing in the existance of Yeshua does not make one a fundamentalist.