@Nk9bjP4A both country's have aldas religion, but in the orbaume kingdom it is allowed to belive in vida, also some of vidas species aren't treated as monsters.
@Sephantis if i remember correctly holy and shadow woke 30 bzw. 40 years ago in the new world up, it was also said that their time of death has nothing to do with the time difference between their arrivals.
@madcat6204 stopping the population decline of the demon race with the sword could also mean that the sword is able to let the population of the demon race grow.