Well, there are many different types of people differing from religion to only where they may live. In General there are people who believe in different things(religion, political, etc.) also people who don't, they may only believe in one thing like science, there can be people who have different positions in life from a president to a single homeless man on a street, there can be people who have grown up in different environments or around different people, or they may be costly and have all they could have everything or have nothing not even a single item, all in all, there are many different things or varieties of people that have many different characteristics.
I hope this helped you answer your question or guide you to it,
Scout was bothered by the fact that Walter poured syrup all over his vegetables and meat because she was raised in a home that took into consideration table manners. Walter’s actions are against everything Scout has been taught from a young age. Pouring syrup all over your plate is disgusting and discourteous.