Paul, not only are we in danger of repeating the Holocaust, but humankind already HAS committed several more holocausts since WWII. East Timor, Khmer Rouge, Rwanda, just to name a few.
I was, like 3, going to recommend the film Conspiracy. And 'difficult to watch' is a good description. One, long, hideous dinner party. It's really an amazing film.
Don't be so Eurocentric..