I think you’re right. It also wouldn’t be unfair to say that, if you’re in a european/western world country that is likely going to be mostly white and also happens to have taken a big part in WW2, that of course it will be a big part of your history. For the US, it’s our history in Europe, but we don’t seem to claim or learn much about European history elsewhere, like Leopold or Churchill’s Bengal Famine.

I think many people are familiar with at least a few mass killers. Mao, Stalin, Pol Pot, maybe the Red Terror, Christopher Columbus, you could even count Khan as one of the biggest, but we might view that as a bloody past and the result of Khan’s conquest of other peoples rather than a internal conflict killing millions of a specific group. Columbus’ mass murder was partly out of ignorance when the European diseases spread in the New World, but Europeans didn’t have too much of a problem with killing natives otherwise.

Hitler, OTOH, as you said, turned mass murder into a pointless, cold, indiscriminate killing machine in a way that no other ruler did. People were warehoused until fed to the machine. The Soviets/Russians and Pol Pot (influenced heavily by Stalin) are a pretty close second, they rounded up people and shipped them off to gulags or prisons and worked them to death if they weren’t just outright killed.

I kinda feel like the rationing of bullets and redemption exclusively for severed human hands in would count as trying to find greatest efficiency.

In reference to King Leopold’s reign in the Congo. It was… Unbelievably brutal and quite modern in their pursuit of “efficiency”.

Nah Leopold and Churchill both did it too