Answer:
From this trial and the actions that occurred within, I have learned that prejudice is a real struggle and that it can be easy to "follow the crowd" and believe what others believe simply for the sake of "going with the flow" more or less. I learned this when Dill cried because he couldn't tolerate the manner in which Tom was being spoken to. He states "somehow it ain't right to do 'em that way" (referring to people of dark colored skin). Believing what others believe simply for the sake of "going with the flow" made apparent by the fact that they almost want him to be guilty because he is black, even though the statements made make it pretty clear that he is innocent.
(I just wrote a quick paragraph which was based off of the information given in the first answer, hope it's good.)