So I fell down the Wikihole reading about "the most loathsome people of WWII."
Odilo Globocnik:
http://en.wikipedia.org/wiki/Odilo_GlobocnikHe's basically solely responsible for the murder of 1.5 million Jews in the death camps in his jurisdiction. That's, what, almost 25% of the total killed?
Mario Roatta:
http://en.wikipedia.org/wiki/Mario_RoattaSo what I loved here was learning -- for the first time -- about the Italian-sponsored ethnic cleansing programs. The Italians, apparently, were setting up their own death camps, largely for Croatians, Slovenians, and Slavs, in general. Their goal was to "de-Balkanize the Balkans" in an attempt, I presume, to take over all that territory. Which is crazy (and would, in fact, present a problem for the Axis powers as Hitler had to delay his Russian campaigns -- to disastrous results -- to help out the Italians in the Balkans and Greece).
So while the Italians were basically fucking up the entire war, this asshole was running around with his own personal army depopulating entire villages by literally beating everyone to death.