The other day, a reader asked me a question about the UMJC. He asked why the UMJC seemed to have so many problems.
I struggled to think of a short answer. But I have it now!
UMJC rabbis (e.g. David Rudolph of Tikvat Israel) openly teach that non-Jews do not belong at Messianic Synagogue. BUT...if a non-Jew goes through any non-Messianic conversion process (which involves rejecting Yeshua through communal and/or halachic norms) then that non-Jew may return to the UMJC and be accepted---as a Jew!
Here's Tim Hegg describing this same phenomenon (though he doesn't reference a specific organization):
"[The desire to be accepted by the unbelieving Jewish community] causes a subtle (and sometimes not-so-subtle) rejection of Gentiles within some Messianic congregations. While most would never speak it directly, many leaders openly discourage Gentiles from joining the Messianic Synagogue, voicing their opinion that Gentiles should find other communities of worship and leave Messianic Judaism to the Jews.
On the other hand, those who come into the Messianic Synagogue as 'converts' to Judaism (whether in Orthodox, Conservative, or Reform settings) are welcomed and accepted. The logic in this is astounding! Theoretically, if a Gentile believer desired to be fully accepted in this form of Messianic Judaism, he could go to the non-believing Synagogue, convert, and then return to the Messianic congregation with paper in hand and be accepted as a Jew. This gives him the right to a 'unique relationship to the Torah' which he did not have before. Where is the Scriptural basis for that?" pgs 137-138 of Hegg's "Fellow Heirs"