When I first heard about Tarantino's movie I said, "But it isn't entirely fiction." And I was correct. A number of articles have since been published pointing out that right after the official ending to WWII some members of the Jewish Brigade went on an assassination spree. It probably wasn't as witty or wacky or cartoonish as portrayed in the movie, but I gather it was effective! And by the way, when I saw Inglourious Basterds, I cheered at the end. We know it's not pure fact, but it's not pure fiction either. Just enjoy the moment.
Police disperse hundreds in brawl in Kafr Manda, northern Israel (Haaretz)
from the article: Israelis go wild for Tarantino's Inglourious Basterds