filmfreak82, logcabnnut and MariMcCabe,
While I don't disagree with anything you have written, what is left out is significant-- the theory we hear all the time that rape is not a sexual crime, it's a crime of violence by those who feel weak against one who has power or is perceived to be a symbol of those who have the power. White men were afraid they were losing the power they'd held for centuries to black people now that they could vote, esp if the unknown quantity of black women were able to vote. The white wan could never control them.
Raping slave women can be explained as just exercising what they believed were property rights. Men who owned slaved believed they owned property. They bought them. Paid money and had to account for them. They thought women (of any color) were merely property back then as well, though those ideas were changing, as were the slave ones (Apparently certain founding fathers did not want to own slaves but inherited them, or faced the economic reality of not being able to run these huge plantations without them. They put provisions in wills freeing slaves upon their deaths, as did George Washington, and freeing their wife's slaves on her death--which caused her family to fear someone might hasten her death to obtain an early freedom. So she quickly freed them all--showing that the Washingtons, at least, knew their slaves were human beings. There are stories that including freedom for slaves was suggested for the new country, the Declaration of Independence and Constitution but that they were afaid Southerners would then side with the British in the war--as many did, and after victory would refuse to ratify the new Constitution.) I wish we could ask Jefferson an d not let him excape a good answer!
Back to the slavery business in general, they had to show the slaves they had nothing, to totally subjugate them, in order to hold control (it had been done by mankind for a millennia and is still being done today around the globe.) Take away their humanity so they never thought of revolting. They also tore up families and couples that formed to remove that humanity.
To me, living in 2016, it seems impossible to deny the humanity of anyone. Because we have seen that people are just like us. We've seen the science and the humanity. Lived with them, looked up to them as President, as stars of sports and entertainment, and science, they were and are our neighbors, co-workers, friends. But society esp Southern society of slave a Reconstruction Days, did not willingly let white people see slaves as people. And same continued until they were forced to change by desegregation laws. They tried to keep them away from the white people with segregation and dehumanization. If white kids did not ever see a black person at school or in the neighborhood or park playing, they'd never see they were people too.
And without the same cash flowing into those Separate accomodations, the were anything but Equal, and became worse. Eventually, the KKK arose to try to scare people beck into the limitations and roles of history, as tho violence would restore a time when even the dumbest white guy could operate a farm by forcing slaves to do the work, where the densest idiot who was white could at least have his skin going for him. They thought violence would bring back the past because they were not operationg on all cylinders. And enough idiots and scared people followed them they hurt lots of people before they were stopped. But they never accomplished anything but the violence.