Why did the south embrace the institution of slavery so vehemently?

There is no true answer except for the simple fact that the people in South were a lot less modernized compared to the North and liked to keep thing's 'old school'. They did not want to let go of the cultural education they had been fed on all their lives to never see black people as their equals. The KKK originated in Texas; the south. Much of the south was extremely racist and through the South was how many southern american immigrants came into the country. So they had a pure hatred for non european-americans because they were racists and that is the honest truth. People need to accept that they were racists to a degree of even following the footsteps of William Lynch ['lynching'] and that was the sole reason. They ignored that blacks were also people and felt that they are white and superior simply because they are white. And that black's have no right to be their equals and to live as free men. They were very sick people who had sick parents that brought them up in such a way.