I chose my words carefully. When an adult confronts a child and terrifies them verbally, that is assault. That's not my opinion; that's the law. Because it is so easy for an adult to create a credible fear of violence in a child, it is very poor judgement for adults to directly confront children.

And the fact you see assault, and a law teaches you that it is so, instead of just scolding, is a cultural bias (sort of) and a point in favor of not living in US - or similar countries - for anyone born and grown up where these deceptive concepts are absent and hopefully not carved in a law.

Once common sense would have been enough: do you scolded my child? Why? What's happened? ... Ha, ok, my son did something wrong... and so on...

Usually it's not that hard.

Instead, a society rambling towards paranoia and driven by fear (especially this), makes a citizen feel the urge to "look at" a greater power, the Great Protector, to "protect" him/her even from an unexistant menace - or to seek revenge.

In the story we are commenting, the first thing I have noticed and blamed was the following: the mother surrenders to the request of the son who wants to go with her to the store. There, she makes the first mistake: the son had to stay at home with the grandma.