[Larrikin]

I think slavery was a bigger crime against humanity than the internment of Japanese, but regard them as both as among the most awful crimes the US has committed to humanity as a whole.

It wasn't meant to rank the worst things humans have ever done (outside of slavery no matter the country, that is almost always a distraction to justify awful things other's have done), but they are both among the most awful things the US has specifically done to the world.