We're taking responsibility for the harm we've done to indigineous people, unlike Republicans who continue to deny racism or its harms. There were residential schools in the USA as well. There are no plans for searching their grounds for bodies, but they are there, when Native Americans go looking for them.
Our Constitution is a whole lot better than the American Constitution because ours is a modern document written in the 1980's for a modern society, and the American Constitution is sadly out of date and behind the times. Women still aren't equal under the law and Republicans oppose the Equal Rights Amendment.
The Second Amendment should have been abolished when America abandoned militias and moved to a standing army. The American Constitution lead to the Civil War and episodes of hyper partisanship and the current state of gridlock in Washington.
The American system of government has a long history of toxic and violent upheavals - the Civil War , Jim Crow laws and the KKK at the turn of the 20th Century, and anti-black violence of the 1920's, McCarthyism in the 1950's, racial unrest in the 1960's, and last year. The USA is currently on the verge of collapsing into fascist authoritarianism.
No other government in the first world has faced this level of violence, upheaval, or civil unrest since WWII. The US Constitution is simply not working for the American people and has been subverted by wealthy special interests using the propaganda organs provided by pop culture.