This term is said to have originated in England before the 16th century, refering to the lower class whose diet primarily consisted of "crackers", actually biscuits. Many of their descendants were sent to the Georgia penal colony, hence "Georgia crackers." White people had invented this name for themselves before the first slave was brought to America, although it is still in use today by mostly older blacks referring to whites.
Kracker, Well comming from a white person I would have to say Kracker fits pretty good. Think about it. If you saw 5 white guys get out of some chevy van and play Chineese fire drill at a stop light, What would you say.