> In fact, current employer has this as a point of policy for interpersonal conflicts barring severe enough circumstances where a reasonable person would say "yes this requires intervention from on high".
I completely agree with you, but what happened here was that this manager sent this email to a large group of employees, not the specific employees she had the issue with (which would be fine!).
This email wasn't an attempt at conflict resolution, it was sharing how upset she was, at her manager, with a bunch of coworkers.
For the last sentence: in the event where one wants to complain to a large group of coworkers, I think it's pertinent to stick to the basic, unarguable facts of what occurred. Suggesting that you've been dehumanized by the company is adding fuel to a fire that you should instead be aiming to resolve privately, if you want to continue to work at the company.