Sometimes I wonder if this legacy was left behind by O'sensei purposefully. What better way to test aikido in a student's life than by watching how that student deals with someone who believes as strongly in something just different enough to cause contention? It's as if the strength of the conviction feeds the dissension, but more importantly, it focuses in on those very beliefs to show whether or not they are actualized in our lives. The more we believe without actualization (ie, talking without action), the greater the risk of splintering in the aikido community.
Hope this makes sense.