That is confusing history with philosophy and theology IMHO.We'll differ on that one. There is some need to assign blame for slavery Edited. It serves the purpose of watchdog for future generations. So assigning blame is relevant, lest bad behavior is excused to re-occur.
If instead you meant that in a different sense: that people today, who had nothing to do with chattel slavery in Virginia, needn't own the blame for it, I'd agree with that.