Let’s face it: it’s April 11, 2013, and the only viable Jewish movements are Rabbanite ones. Even secular Jews operate completely within the Rabbinic framework.
This lack of religious diversity doesn’t bode well for historically non-Rabbinic movements such as Karaites. At some level, non-Rabbinic movements can only survive if (religious) Jews are open to adopting interpretations that, while differing from mainstream views, are consistent with the Tanakh.
But, fundamentally, it takes much more than “open-mindedness” on behalf of the Jewish community. It takes clear resolve and dedication on behalf of minority Jewish movements.