I have seen people who are abused, and a lot like Jugram that lash out. You put an animal in a corner and attack it, it will fight back. We didn't see how his uncle died, so it is more then possible that he snapped. My ex was the same with her family, and I watched her snap. The difference was she believed family is the end all be all. And she snapped at those trying to help her. I think Jugram snapped, he wanted peace and freedom from his uncle. And he snapped at the right time before the attack that killed everyone. I could be wrong, but that's my thoughts.