If you re-read my post, I am not beating up on the Americans for the deaths in WW2 -- but for all the deaths that followed in their many, many undeclared wars all over the planet. It seems, that specifically the USA has not learned the lesson of WW2, literally killing millions since then (the majority civilians).
Now they are preaching to the world as if they are morality and wisdom incarnated, while they have a president implementing the Nazi playbook action for action just as I write this.
Just today the news that Trump wants to suspend the habeas corpus; we just need to wait what will be their version of the "invasion of Poland": Greenland, Panama, Canada, Gaza... and finally, at the moment, the USA is "just" trying to deport people -- as did Nazi Germany in the beginning, even though neither the UK nor the USA wanted the Jews -- but this is already a slippery slope: will their version of concentration camps be in Guantanamo Cuba, Cecot El Salvador or a more exotic place like Lybia?
I believe the world has learned their lessons, but no American has the right to say a single word: right now, they are literally the bad guys.