We saw something very much
like this in Origin of PCs, with Orcs.
Spoiler
Show
Not so much "attack" (since the people in the settlement were commoners) as "flee in terror and alert adventurers, requesting that they help, by hunting down and slaying them, with the adventurers happy to oblige, without considering the possibility of panicked overreaction being in play."
And in the main strip, when a kobold chases a halfling in town, intent on "delivering justice" all that it takes to have the kobold be attacked
without any "who's the wronged party" questions being asked, is an advert:
https://www.giantitp.com/comics/oots0357.html