Kyonyuu Fantasy/Headscratchers

Yes, this is a fantasy nukige H-game with a 2 episode adaptation, but it still has a surprisingly interesting story, which begs the questions....

The Racial Feud between Humans and Demons

 * Both sides are said to have ample reasons to view each other in positive AND negative lights, but there are so many parts of it that seem to be contradicting, such as King Hagel I marrying a Nymph and keeping her identity as a demon (as well as their daughter's identity as a half-nymph) a secret from everyone rather than just rescinding and removing the "Demon Extermination Order" like Lute does when HE eventually becomes king?