Does Jesus really think that God is like an unjust judge? Indeed not. But he knows how all of us are inclined to have an unjust judge well installed into our consciousness. In fact as part of our socialization we acquire a voice or set of voices which seem to be completely impervious to anything. This voice or voices, should we be so bold as to want something, will quickly send down little messages to us: Shouldnt want that if I were you better not to want much, so as not to be disappointed, or Getting above our station are we? or, as in the famous Oliver Twist scene, More?!! And the point of these messages is to shut down our desire to get us to mask our discontent with remaining mere puppets of our group. Our unjust judge is internal to each one of us, a glowering no in the face of our potential happiness.