Atticus was basically saying that Mr. Cunningham belonged to a group of people who valued their integrity and principles above all else. By calling them a "set breed of man," Atticus was acknowledging their strong sense of honor and decency. In other words, Mr. Cunningham was a good guy who stood by his beliefs, even if it meant going against the norm.
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.
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.
Scout is thinking about the events of the day, particularly the mob that came to the jail to harm Tom Robinson. She is also thinking about her father, Atticus, and his role in protecting Tom. Scout reflects on the harsh realities of racism and injustice.
Mr. Cunningham and the other men came to the jail to lynch Tom Robinson for raping a Mayella Ewell.
When he came over for dinner.
Kladruber.
Michael Gray ran into a wall and left skid marks up to the cafeteria aha. and that Andr'e kid came outta no where and farted in Michaels mouth while saying "TRUE AZZ!"
This breed came from England originally.
from Mexico... or do you mean which breed did it come from?
Atticus said, "No, we don't have mobs and that nonsense in Maycomb. I've never heard of a gang in Maycomb."
That face when you fart and it smells awful, but you kind of like it.
A breed of brown horses. They came from Astria and Italy.