What about these is petulant and counter-productive? All of these seem like standard union demands (seniority rules) or stronger adherence to what are already legally required (anti-harassment). The only one that stood out to me as being unusual, but not in any way counterproductive or petulant, was a demand that the company support workers who act in self-defense against aggressive customers.

You can search my HN comment history, I'm the furthest thing from pro-union, and nothing in here stood out to me as being inappropriate.