Atticus reminded Mr. Cunningham of their shared history and humanity. He appealed to Mr. Cunningham's sense of decency and individuality, encouraging him to think as an individual rather than as part of a mob. This personal connection and appeal to his conscience caused Mr. Cunningham to disperse the mob and think differently about the situation.
Scout recognized Mr. Cunningham in the mob and engaged him in conversation about his son, which humanized Atticus in Mr. Cunningham's eyes and helped diffuse the situation. This act of empathy and understanding ultimately led to the mob dispersing and Atticus being saved.
When Atticus says Mr. Cunningham has blind spots, he means that Mr. Cunningham may have good qualities but also holds biased or flawed beliefs. In this case, he is referring to Mr. Cunningham's participation in the mob that came to harm Tom Robinson, despite his earlier display of kindness towards Atticus.
The fact that the kids come over, then that Scout starts talking to Mr. Cunningham brings them to their senses. Plus, Atticus and the group were covered from above by a towns-person with a shotgun who would've defended Atticus.
In "To Kill a Mockingbird," Scout unknowingly diffuses the tension during the mob scene at the jail by recognizing Mr. Cunningham and engaging him in conversation about his son, Walter. This interaction with Scout reminds Mr. Cunningham of his humanity and the respect he has for Atticus. This ultimately leads him to disperse the mob and prevent any harm to Atticus.
Mr. Cunningham
Scout shares a message from Atticus about how Mr. Cunningham is a good man at heart and that he should allow his conscience to guide him. This makes Mr. Cunningham feel ashamed of the mob mentality he was caught up in during the attempted lynching at the jail.
Scout and Jem made Mr. Cunningham stand in Atticus's shoes by showing him empathy and understanding during the mob scene at the jail. They engaged him in conversation about personal matters, creating a connection that reminded him of his own humanity and the importance of doing the right thing. This helped Mr. Cunningham recognize Atticus as a fellow human being and not just an adversary, leading him to disband the mob and leave peacefully.
Scout stops the second mob in town by pretending to be a lost child and confronting the leader of the mob, Mr. Cunningham, by referring to him as a friend of Atticus. This personal connection and reminder of their shared humanity causes Mr. Cunningham to disband the mob and leave.
Scout asks Mr. Cunningham about his family, business, and entailment. This has an effect because it reminds them that Atticus is their friend and neighbor, and it singles out the members of the crowd.
Scout tries to defuse the situation by striking up a conversation with Mr. Cunningham, asking him to say hello to his son, Walter. This personal connection with Mr. Cunningham helps to remind the mob members of their own humanity and individuality, causing them to disperse and abandon their violent intentions.
Scout intervenes in the mob that surrounds Atticus outside the jail in "To Kill a Mockingbird" in Chapter 15. She recognizes Mr. Cunningham and engages him in conversation, reminding him of his humanity and leading to the dispersal of the mob.
Mr. Cunningham was one of the men from Old Sarum who came to lynch Tom Robinson but was unsuccessful because of Scout, Jem, and Dill's interruption. He was also one of Atticus' clients when he needed legal help with a land problem. Scout and Jem had taken his son, Walter, home from school to have lunch with them on their first day of school. When Scout recognized him and began to talk to him on a personal level, he was convinced to lead the Old Sarum mob back home without hurting anyone.