Earlier quoted context omitted.
I think it’s normal to ask questions: if nothing has ever happened to the US for similar abuses, why should something happen to any other countries?
I wonder why you would think that it's normal. If something is unjust it should be prosecuted, regardless of the past. There will always be criminals who get away with crimes, this doesn't mean that we should give up.
That's why fair assessment is required. And, I personally think US & UK have no rights to teach other about humanity. They are currently pointing atrocities in China to forward their political agenda, not for humanitarian cause. Countries like Sweden & Switzerland are in better position to lecture other other countries regarding peace & harmony.