Final answer:
Atticus says that the cruelty of his enslaver may turn against him in the trial.
Step-by-step explanation:
When Atticus speaks to Uncle Jack about the trial, Atticus says that the cruelty of his enslaver may turn against him. In the trial, Atticus is defending Tom Robinson, a black man accused of raping a white woman. Atticus fears that his defense of Tom may anger those who support racial inequality and may lead them to turn against him.