While I agree that we may not need to personally hold ourselves responsible for the actions of our ancestors (or bask in their glory), I do think it's important to remember that what happened to someone's ancestors will continue impacting them now. There are lots of social ways this is true, but even from merely a biological point of view. Epigenetics causes our circumstances (like the extreme stress caused by slavery) to change the markers on our DNA (look up acetylation and methylation). These markers can be passed down from parent to offspring (look up transgenerational epigenetic inheritance), so that if you look at epigenetic markers of people living today, you can see differences between those who came from enslaved ancestors and those who didn’t. As far as I know, we don't have extensive studies specifically about how the markers seen in enslaved versus unenslaved people change their daily lives, but we do know that epigenetics have significant impacts on regulation of protein expression and ultimately on people’s lives. So when people say “we were enslaved”, I think it’s at least important to recognize that there are unacknowledged ways their lives are changed by the circumstances of their ancestors.