Earlier quoted context omitted.
Or maybe as an example for other managers? Basically it's "no union" or your head... Disgusting anyway.
I'm skeptical, because it seems like most of the anti-union activities are either dictated or run from HDQ. It doesn't feel like something where the local leadership was free to make their own plays.
Firing managers where unionization happens encourages managers where unionization efforts are under way to make their own plays, whether this is formally allowed or not, whether by company policy or the law.
Obviously, getting caught on independent, policy/law-forbidden, efforts would also have adverse consequences, so the incentive also is to not get caught.