Hi, not discouraging fresh responses here, but fyi, you can get started on some previous answers
/u/OnBehalfOfTheState in What was/is the significance of cross burning at klan rallies? What, if anything, does it signify or represent?
/u/Dubstripsquads in Why did the KKK, a supposedly Christian organization, burn crosses, the symbol of their religion in order to intimidate?
How did the burning of crosses become a symbol of the Ku Klux Klan?