The injustice of the Separatists assault and the deaths of many Jedi while he was stuck at the temple would be the first thing to start his fall, but I wanted him to be a bit more multi faceted. Since he is cloistered and unused to being in the galaxy at large I thought he would be a bit protective of the other characters, a task he is unsuited for, and given the nature of the campaign he would inevitably fail at. After rereading that I  thought that it seemed a little rude. To be involved with the other characters like that.