What was the most "savage" moment in ROT?

The most savage moment is definitely when Cassie gets her revenge on Lillian Jean. This is the most savage part because Cassie blackmails Lillian Jean. She also beats her up, even though Cassie is a few years younger.

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I think that David purposefully burning his cotton and land to save TJ and the bring the community is the most savage because it SAVES A LIFE. He is thinking long-term and is willing to make a sacrifice.

he most "Savage" moment was when Cassie got revenge on "Miz" Lillian jean. She was very patient with Lillian ,she would listen to her secrets and even call her "Miz Lillian Jean" which i guess was hard for her to say . But Cassie was very smart telling her if she told anybody she will let everyone in Jefferson Davis which is the school Lillian goes to know who Lilian's crush was which would humiliate her a lot . And  of course Lillian deserves it  for being a little brat  and thinking she's way better than the others. and like mama says " white people may demand respect ,but what we give them is no respect but fear ." And Cassie showed that she isn't afraid of Lilian , and stood up  to  let lillian know  she isn't going to let nobody turn her around .   

Rather than a "savage" situation Ms.Donohue, I think of David setting his OWN cotton on fire as an act of heroism and sacrifice. Despite just barely making the next few payments with all of his cotton, losing some would be devastating. Therefore, rather than there be a possible chance of a death having to occur for the Nightriders to let go of the Avery's, David set a portion of his cotton on fire in order to distract them from the execution of the Avery family, and come together to save the land and keep the fire from moving towards town.