> Hey, I have a crazy story. I found this website today. There used to be this person who did this and that. And he’s our grand-grand-grand-father
Imagine your class mates would discover, that your grand-grand-grand father owned slaves and they had pictures...
Why would I worry about people knowing what my great great grandfather did?
It becomes significantly harder to talk liberal/libertarian shit if everybody knows you're a descendant of slaveholders speaking to an audience of descendants of slaveholders, ridiculing the descendants of slaves.
If your ancestors were slave owners, that information is there. If there is a picture, that will be there too. You would be astounded the sorts of detailed records that people have found and digitized.
Pretty much if you were an affluent family that could afford one, you owned at least one slave.
Notably, Mitch McConnell's, Obama's, and Biden's ancestors are all confirmed to have owned slaves. Not surprising as they all come from affluent families.
It isn't fair, but no one can really escape their family history.
And while mature folks understand that their ancestors were probably horrible people, sometimes by both today's and yesterday's standards - it isn't something that always shows in actions.