People: "We're tired of all these 'misunderstood villains' we want unapologetically evil for the sake of evil."

Frieren: "Okay here's monsters that learned to imitate human language and emotion solely to manipulate and kill humans."

The same people: "No! You're wrong! They're just misunderstood and you're doing a genocide!"

Yeah, any media that depicts something human like being an irredeemable monster that the only solution is destruction is inherently tricky because dehumanizing is pretty much always the first step in mass atrocities irl. But my God I've seen so many people tie themselves in knots trying to give the benefit of the doubt to demons in Frieren.