I've never quite understood this American need for self-flagellation. Yes, terrible things happened in the past in the USA, and are continuing even up to the present (you seem to be marinating in hundreds of millions of handguns nowadays, killing so very many every day, for example).America started out as a genocidal slaveholding nation. Since then we've very gradually been getting better, in a two-steps-forward, one-step-back kind of way, but we still have a long way to go.
But, it's hardly fair to compare America to some Platonic ideal, is it? Brazil outlawed slavery more than two decades after the USA did. Women couldn't vote in Switzerland until 1971. Everyone living on the planet is living on land taken by conquerors at some point in the past, often the very recent past, if you look at, say, the India-China border or the Russia-Ukraine border. We could go on and on, cataloguing the Hutus with their machetes, the Saudi prince having a journalist dismembered, the Chinese Communist re-education camps in Xinjiang, the Tamil Tiger suicide bombers, Qatar using migrant workers as slave labourers dying of heat stroke to build a stadium for the World Cup. Even the aboriginal inhabitants of the Americas were tribes, often quite proud of their warlike heritage, who conquered other tribes and took their land: complaining now about having it done to them seems a bit ironic.
Just ask yourself, why are so many people scrambling to immigrate, legally or illegally, to your horrible nation? Reminds me of the famous political cartoon of a belligerent border-crosser confronting a border patrolman, screaming, "I demand to be allowed to live and work in your racist country you fascist bastard!"