You were born different, but that doesn't mean you have to follow rules/laws you don't agree with. Have you ever been faced with a choice to either follow or live your life alone? To never have a friendship, never to love, or have a family. To have your life dictated to you. To have the ones you do love threatened with death.
For a group of Incubi and Succubi that was the case. They rebelled against The Elders and refused to hurt humans. They dared to love, to have hope, and a future.