No, there's actually quite a difference. Said synagogues tend to be very loose in terms of theology too and are more just social clubs for ethnic Jews. But this church and the rest of the emergent church movement like it are pretty orthodox (small "o") theologically and it's really NOT possible for anyone going to be simply "culturally emergent", if you're an adult and you go to an emergent church, you have to be a convert. (Well I suppose it's possible if you're in your very early twenties and your parents were very early adopters of it, but that's a miniscule number of people.) And thus there is not any real connection to ethnic background in numbers either. (well except for being almost all white people) No one goes to an emergent church just because they are "culturally" Christian, it's because they believe in Jesus Christ.
Also don't forget "faith" is much less of a necessity to function in a Jewish congregation than in a Christian congregation to begin with. For instance, I have no idea if the hazzan of my (orthodox) shul believes in G-d (though probably he does), and I'm even less sure about my fellow congregants. It does not really matter.
Your post about the sermon you attended, by the way, immediately reminded me of this.
This wouldn't surprise me with a Reformed Jewish temple, but I'm a little surprised that it is the case for an Orthodox Jewish synagogue. I would tend to think that the myriad of requirements (like eating kosher and observing the sabbath) for being an observant Orthodox Jew would discourage people with little faith from staying in the fold - is that due to the social benefits/cohesion of being in that group?
Also, I thought your statement about tikkun olam was interesting - that seems to explain the social justice tendencies of many Jews, especially more secular ones like Bernie Sanders.
