IG, I think it is the nature of goodness that allows us to feel guilt, even when it is misplaced. The problem is the hating ourselves for it and trying to destroy the hate by hurting ourselves. Sounds rather convoluted, I think; but essentially, I believe that being able to feel guilt even when we needn't comes from a place of goodness and humanity. And perhaps the more we can acknowledge and accept the impulse, the less painful such guilt can be.