"Only" 300.000 black people have been brought to US as slaves. Less than 5% of American families owned slaves.
Also to put things into perspective - between 1MM and 1.3MM white Europeans have been enslaved by Arabs.
What has been done to Native Americans is horrible. Slavery is horrible.
But I have no idea what any of that has to do with the fact that United States is really a one-of the kind country in the world.
I think that Americans should take a long hard look at all the problems on their plate, but they should really stop falling for snake oil peddlers who are selling Identity Politics and trying to benefit from pitting communities against each other.