Nietzsche’s sister posthumously took some of his unfinished writings and compiled them into a book called The Will to Power.

This book was then misinterpreted by Hitler and the Nazis.

I think, could be wrong on that.

This is totally true but i think blaming all that on will to power and elisabeth is a bit inaccurate. Nietzsche continuously talks about how jews caused the great slave revolt which resulted in christianity and how any egalitarian movement demanding equal rights for all is just one big slave revolt because people are inherently unequal in worth and those who are superior should be made masters. All this inherent hierarchy talk is mother's milk to nazis

Just read beyond good and evil 257 and 258 to see what I mean