What is worse than forgetting history is having a selective memory of it.Not even close to Iran. It terms of deaths in any country across recorded history - Iran and China are the champions. 90% of the Iranian population was exterminated by the Mongols.
As for China, well I think Mao may have outdone even Genghis Khan.
Besides, what people do not realize is the openness of US society in confronting its past, and its present ills, to build a better tomorrow. When all the enemies have is a self-report analyzing the events of 150 years ago, you know they have already lost the present and therefore the future and this is all they have left to console themselves.
USA, meanwhile, will always learn from itself, including its history, to continuously improve itself. Meliora!
So your beef is with Great Britain. Trying to pin the sins of the father on the children will never work.But Anglos committed genocide on three separate continental sized nations, the US, Canada and Australia.