Seriously though, why is it so hard for humans to just be nice? It shouldn’t be that hard. But throughout human history we’ve proven time and time again that it’s basically impossible. The point is further illustrated in this post, with a nice Good Omens reference at the end:
Crowley: [during Jesus’s crucifixion] “What has he said that made everyone so upset?”
Aziraphale: “Be kind to each other.”
Crowley: “Oh yeah. That’ll do it.”
