I have 0 clue how GB telling the Scabbards they have no rights is clown behavior.
Albeit, that was already done.
Greenbull is clearly a flamboyant personality.
Her overreacts. He jokes around.
He is clearly not being fully serious in Wano.
This does not change the fact that Shanks managed to deter him from persuing his goals from afar.
The point you were trying to make got countered, ultimately it was moot anyways.