I knew someone who actually got upset when he was told that the Titanic sank at the end of the movie.
Or the story about someone surprised/upset they killed Abraham Lincoln at the end of the movie.
I love how Tarentino dealt with this in Inglorious Basterds.
Hitler really does die in that theater, because that's how movie logic and American historical memory would prefer it to happen
For those of us who know how history should, it works. And for those who don't, it also works.