at least the Nazis fed their prisoners.
what Nazi concentration camp never fed prisoners, they lets them starve, they put them to work until they died, when these camps started Germans would execute train loads of people when they arrived, soon ammo became an issue. So thats when they would toss little kids and babies into ovens, and the older people were put into the gas chambers, the Jews were actually told that the chamber was for showering. The only ones who might live were beautiful women and Jews who had mechanical use. Some of these camps where killing 10,000 Jews a day. What Hitlar and the Nazi's did was horrific. Nazi concentration camps had the most inhuman treatment. Axpr. 6,000,000 million Jews were exterminated.
Although I do know other inhuman treatment, such as the Soviet Union in WWII, to get back at Germany, because of what they did to their country, destroying everything and everyone in their path. German's who were surrondering would shoot themselves so they wouldn't be captured, at the end of the war when United States troops and Soviet Union troops began to reach one another, German troops surrendering would run to U.S. troops. If a German became a POW, they would have to inflict terrible ways of torture, cutting the soles of your feet open and pouring salt in, knocking teeth out with hammers, and for us guys out there electro shock treatment (as it was called) and a hammer to the testicules.
Finally the Japeneese (WWII) POW, U.S. marines. Some ready mentioned I think, tied to stakes, eyelides cut open so you couldn't close your eyes from the sun, no water for days, (common ailment for any POW) beaten, and burnt. Japeneese troops would tease POW, by spilling water near them, unloading pistols and giving them to the prisoner to kill himself, which he couldn't no ammo.
Also American Indians did the some of the same things Japeneese did, when a whiteman was captured they cut eyelids off, burnt them to death, cut there soles of their feet, and cooked them alive in buffolo hid over a fire.
Grusome stuff, but still the Jews in concentration camps had the most inhuman treatment.