Personal experience. I'm Jewish myself and familiar with a variety of Jewish communities. The Lubavitchers (sp) have none of the nagging self-doubt that is epidemic with the rest of us - they are confident and prosperous.
i'm suspicious of any group in which there is no self-doubt. it's only through self-doubt that we find ways to improve ourselves. That said, I know what you are saying - there does seem to be a growing sense of unease among many other groups of Judaism, especially as the reform movement becomes increasingly liberal - leaves folks like me in a sort of a limbo.