From my point of view, most of you are overthinking all of this. With that kind of criticism even real history doesn't seem to make sense. Here is the story i felt i was told about during my play.
It's a bunch of innocent refugees being scapegoated by a demagogue as the source of the community's problems until an outside force solves these problems and teaches the community leader the error of their ways by having their true leader step in and reprimand them. After which this true leader gives a speech about the value of outsiders. Now the rest of BG3 will be about following these innocent refugees along the road to happiness and assisting them against the dangers of Faerûn as well as the bigotry of its inhabitants.
Tiefling lives matter.