"According to Miss Stephanie Crawford, however, Atticus was leaving the post office when Mr. Ewell approached him, cursed him, spat on him, and threatened to kill him"(Lee 248). This shows individual discrimination against Atticus from Mr. Ewell because he is angry that Atticus 'chose sides' and chose to try and fight for Tom. As well as not liking that he did not ruin the Tom Robinson case and Atticus actually tried to make people look at who the real bad guy is and which would basically expose Mr. Ewell. Atticus shows his morals with the way that he responds to Mr. Ewell's evil actions. Atticus does not sink to his level and fight back with angry words or violence he simply stood there and let him express his feelings while keeping a calm composure.
"in our courts, when it's a white man's word against a black man's, the white man always wins. They're ugly but those are the facts of life"(Lee 251 and 252 cultural). This shows more cultural but it could be institutional because of the mention of court systems. Atticus' intention was to express it in a way that tells Jem that the color of a person's skin could change the verdict. Whether there was cold hard evidence proving a white man guilty then a black man can still be convicted just because of his skin color when he was born. I think this shows how the town values their person views towards race over keeping people safe.
I think both the quotes prove that everyone in town obviously sees things differently and likes to make it known when they are against something. This creates a tone of tension and possibly just anger. Everyone seems to be angry about something that is happening in the story which is putting everyone on edge, it seems to make the tension more uncomfortable.