well this series portrays incest in an emotional frame, as if it were a forbidden love story, while in reality it is a pathological deviation and a crime.
It makes the viewer sympathize with the act instead of rejecting it, which is the most dangerous form of normalization.
Also, It reflects the fragility of Western/European society in dealing with values: instead of art being a tool to elevate morals or expose corruption as a warning, it has become a means to normalize and promote it.