Uhh isn't that a bad idea? The "Oh a monster! Let's kill it" way of thinking? I mean, what'd you do if you were to attack a servant/comrade of a monster similar to Re:Monster MC / Rimuru / Ainz? Killing just because they are monsters, that bird clearly hasn't done anything to them. I mean, the dungeon is technically the monsters home, and humans are trying to invade it. They get killed, then come back and make monsters look like baddies.
That's how I see it.