The film Once upon a time in Hollywood is a history of the Tate murders told from the point of view of her neighbors. I put it to you that it’s no more fiction than Tarantino repeating the tradition that the Inglorious Basterds blew up all those Nazis in a theatre. Now, did the Manson family members really get their shit rocked up and down by Cliff Booth and Rick Dalton? Did Hitler meet his end in a storm of righteous fury? Probably not, but it’s fun to imagine a better world.

I’m not saying every frame of the movie is historical fact, but I think it would be inaccurate to call it fiction.