With your question, I might add this question: ‘How many ancestors of Americans were NOT in America in 1860s...My relatives left Europe in 1911, 1915 and 1920.
Combining our statistics would create a very large per centage of current citizens who have ancestors who have nothing to do with slavery.
Add the group of Africans who were responsible for the gathering up and selling their rival tribe members to the list of slave owners ( This include BHO ancestors)
My family did not arrive until after 1900. They also did not settle in a Confederate state. I have no ancestral bone in this fight, I merely point out that the Declaration of Independence should apply to the Southern States in the same manner it applied to the original 13 slave holding colonies.