Final answer:
Atticus says that the fact that his family would be torn apart may turn against him.
Step-by-step explanation:
When Atticus speaks to Uncle Jack about the trial, Atticus says that the fact that his family would be torn apart may turn against him. This refers to the potential backlash and negative consequences that Atticus and his family may face if he continues to defend Tom Robinson, a black man accused of raping a white woman, in a racially divided community. The racial tension and prejudice prevalent in society at that time can lead to hostility and threats towards Atticus and his family.