No, this is not a why is there scalping in a WW II movie topic, it’s more of a “hey that’s a neat idea”, where did Quentin conjure up such a heinous act of violence topic.
Most films that contain scalpings are westerns of course, and I think THE most famous scalping was done by John Wayne as Ethan in The Searchers, when he scalps “Scar” the Comanche warlord. The actual scalping is never actually shown in the film but the initiation of it is. I don’t think I’ve ever seen any scalpings in any WW II movie or any actual accounts of it in real life, there were a few in Vietnam but not WW II. So besides The Searchers what other GOOD films contain acts of scalping human beings?