I would wonder if the writers of the letter could be held personally liable rather than “acting in their official duties” cover.
Acting in “Their official duties” hurts them more, I believe.
It is denial of civil rights under color of law. They are using their official status to deny a legal business due process. They are attempting to subvert the rule of law in favor of their prejudices.
It is precisely what “progressives” want government power to be, their intentions, their prejudices, their choices, without restraint.