My point was that the essential element in allowing slave-owning to have a place in North America was the existence of the Atlantic slave trade. The fact that slave owners included Native Americans, and indeed some people of African descent, as well those with European roots, is interesting, and it is right to bring it to the attention of people - but it's a secondary matter.

None of us have any part whatsoever in the actions of our ancestors, bad or good. The kind of shame (or pride) which seems to claim that we do is misplaced. And it can be a distraction from the responsibility which every generation has in relation to the crimes of the past, which is to try to undo the evil effects which may carry on into the present, and to learn lessons from the past and apply them for the future.