Earlier quoted context omitted.
As a counterargument to the claim that Europe is less violent than the United States, especially over a historical period going back to the 18th century: Nazi Germany murdered more people in a single named process than the total number of murders in the United States for the entire 20th century.
There is a case to be made that war is just legalised murder, but nevertheless in these comparisons the context does not normally include war . And would you really want to? The US is far from innocent with its use of nuclear weapons, fire-bombing Japan (Truman: "there were more people killed by fire-bombs in Tokyo than dropping the atomic bombs"), Korea, Vietnam, Afghanistan, Iraq, and so on. Note that I'm not sayin…
https://en.wikipedia.org/wiki/The_Holocaust
> Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population.
Notice the use of the word "murdered" in the second sentence of the article, as well as throughout the rest.
The context was violence, not criminality. But even if it were criminality, the Holocaust is widely considered a crime against humanity.