They had been exploited by this guy for over a year now, and several of their tribe had been devoured by him. To say they bore no grudge against him was impossible.
Especially Gos, every interaction with him was fraught with dread, fearing that he would bite off his head as a snack, just like he did with the previous Blackwell Leader.
Now that the tables had turned and he was in their hands, it was natural to want to get some payback, crush him, crush him, crush him.
The Gnoll previously singled out by Gos, seeing that Gos was fine, immediately sprang into action, volunteering to run over, grab a horse brush, and join in the grand endeavor of scrubbing.
Regardless of whether they were Goblins or Gnolls, these small humanoid races were oppressed by larger creatures most of the time, accumulating a great deal of dissatisfaction deep in their hearts. Given the chance, they thoroughly enjoyed bullying larger creatures, venting years of accumulated hatred and malice.