Does it make their lives any better if they knew?
I didn't know that, but if knowing how many jews were killed makes my life and my society better, I'll start reading history books.
Personally I think their low level of capability in math, physics, chemistry is much more critical and has more impact in their lives, than their level of knowledge in history. If for any reason someday I gain the power, I work more on scientific aspects.
Again just what I think. You may think different and be happy that I won't have that power ever.