Oddly enough, some foolish adventurers really did sacrifice themselves in the process of saving the native demon tribes.
And they issued strange statements, "The demons are no different from us, they can eat the same food as us, do the same work, wear the same clothes, use the same tools, and even learn each other's language. With effort, we can achieve great unity with the demon tribe. Some of the demons' elders and folks are suffering right now; seeing how impoverished their lives are, despite their love for labor and their honest and cheerful nature, they are oppressed by tyrants; we must save them!"
It was common for adventurers to see a beautiful demon girl in distress and rush to her aid, thinking themselves heroes saving a damsel, not knowing that the girl thought of them as a bunch of idiots. There was even a demon girl who, after being rescued, ate an entire team of adventurers.
