Ahh you win, I feel bad for the guy. Tanjiro is right, the demons were people at one point, and it seems Muzan took advantage of many of them to make demons for himself. It still doesn't excuse Rui from being a real jerk to his fake family.
@Serkket We care. Because it is the best thing about this manga. It shows that the demons were humans but the circumstances pushed them to become demons. Without the backstory, it is just a shallow manga with shallow villains.
Debates:
Should we not show the bad guy's past because they're bad guys?
or
We should still show the bad guy's past because every demon used to be a human?
Personally,I totally like seeing these backstories. This one in particular stabbed my heart.
aww, such a beautiful reunion... IN HELL! Hmm, I thought this was Japan before the Europeans or is there another religion that has a hell like Christianity that is in Japan? I thought it was all reincarnation so long as there is a soul