It’s interesting, because I’ve taken a personal firearms course that involved concealed carry in the US and they talk about de-escalation there (I’m pretty sure they have to). I would at least expect the same from police (obviously their training would be much more in depth with all the tools cops get).
The premise of the article is Police showing escalating force, increases escalation of protestors.
While likely it's a feedback loop, the police are expected to keep the peace; so there exists a higher standard for their behavior.
Yet, an oft criticism is that LE agencies don't always get the de-escalation training they need.