This past January I traveled to Israel with a group of 20 clergy. Our group included four rabbis, two imams, two Roman Catholics, and a diverse range of Protestant pastors.
Diaspora is not an image of the Church. It is, rather, a historical descriptor of the Church at a given time.
If you've lived in evangelical sub-culture long enough, you probably have Gentile friends who try to do the Messianic Jew thing, kippahs, tallits, shofars, and all. But it's not enough.
Might it be that theological insight is most likely to occur in the state of “vulnerability and unprotectedness,” in those moments that seem very dark indeed? There might be evidence for this in the thought of Bonhoeffer and Merton.