Because there's so many other things to give us flak over?

  Civilian deaths related to the second Iraq war?
    - Between 155,923 and 174,355 (or if counting 2011-2017, 175,792 to 196,572)

  Civilian deaths caused by US and SV in Vietnam massacres?
    - Between 4,000 and 10,000, or 110,000 to 310,000 (Maybe double that, depending
      on how you count which people were killed and for what reasons)

  Native American Genocide?
    - Between 10 million and 114 milllion killed

  Enslavement and Transportation of Africans?
    - Between 10.7 million and 12.5 million

But the real reason is we still have the most nukes, and a lot of money and influence. We may occasionally get the ICC or the UN condemning us, but we just ignore it, and all the other major powers do too.

Why would a country that has done terrible things try to remember any of that, unless a more powerful country forced them to?