BUT the ranting is now at the stage where it has created chaos everywhere. And that has been costly everywhere, first of all in the US. Can the concessions make up for that cost? Is anyone in the mood for concessions by now? It's becoming doubtful. A little outrage would have been no big deal, but it seems we are already past that.
I can now see a second theory: if you see a stalemate you don't like - and your position is otherwise somewhat strong - you can kick major mayhem all around you and stand ready to grab what falls back down from people in a less strong situation. A mix of disruption and being bold when the others are fearful. In that situation, the cost of chaos may be acceptable because you believe you can survive that chaos while the others cannot.