"It's humanitarian because this is good for me, and I'm human."
Faster than you can say "monorail," Leopold turned the Congo Free State into his own privately-owned slave state. The region's primary export was rubber, and if the Congolese didn't produce enough of it, Leopold's men took their hands. No, not for a gentle admonition -- they literally took their hands. "Baskets of severed hands" were collected on a regular basis in the Belgian Congo, including those from children as young as five. We know because we have photos of them.
Those Europeans couldn't tell, but they were all giving them the finger.
And then the whole situation really got out of ... well, you know. The men in King Leopold's forces were required to present one severed hand per bullet spent, to prove that they weren't wasting ammunition shooting at cans or something. Eventually, soldiers started going straight to collecting hands instead of bothering with the rubber at all, and whole villages had hand-chopping wars. "A land where the currency is severed body parts" sounds like something out of a fucked-up fantasy novel, but it actually happened.