The Jedi actually tend to be somewhat flawed in their approach. Their (given what happens to the sith, quite sensible) idea about not letting emotions rule, and peace and serenity seems to have fallen into a kind of monastic ascetic kind of idea. Rather than confront, and deal with emotions in their proper place (or let them run unrbidled as the sith do), their teachingss are nothing more than a self-denial/head in the sand concept, which, as anyone who's ever read any of the headlines about some of teh things catholic priests get up to will know, is liable to backlash sooner or later.