So, have you signed up with some ancestor research company to find out what you and your family are personally responsible for? Which slave names are the results of your great great grandfather’s rape? What theft, what oppression, what abuse did your people inflict on others? Do you care?
How many aunts and uncles, brothers and sisters, sons and daughters did your family personally kill, in war or in cold blood? Could you count them all?
Are you committing to seeking out and making good all the past offenses and atrocities of your own personal family, and show us how it ought to be done?
OR - you could accept the past as it is because it won’t change, flawed and time-locked as it was, with good examples and bad, but that’s what happened. Forgive yourself and your ancestors and mourn for those who were hurt. We absolutely need to accept the truth to learn and grow.
That doesn’t mean we have nothing to be thankful for today. I daresay even you might find something to be thankful for if you thought about it, Satan.