Ah yes, the jewish example.

Genocide is a tough thing to get over, even if it happened before you were born. I have relatives who got put in the camps in WWII, relatives who were already Americans and went over there and died fighting. Plenty of my jewish friends and family still refuse to even think about buying a german car or any other product of Germany. Me, not so much, they make damn nice cars and kitchen knives.

That said...

Judaism has Yom HaShoah which is a Holocaust memorial holiday. A big part of the religion is forgiveness, even for shit as fucked up as the Holocaust. So, that's a big component of Yom HaShoah, that and saying to ourselves "never again will we allow something like this to happen."

Even with the official jewish forgiveness about the matter, the majority of Germans are none too happy about their legacy and there's a lot of collective guilt over there about the whole thing, and relatively frequent apologies. Generally along the lines of "we know an apology is never going to change anything but we're still sorry."

There's more forgiveness on the side of the victim, and more contrition on the side of the aggressor, and it happened a lot sooner after the fact than with black people in america. So hey, maybe it wouldn't hurt things so much for the Commonwealth of Virginia to issue an official apology to black people. Maybe it also wouldn't hurt for black people to forgive the old slaveholding states.