Ubermensch
An individual ideal of value-creation became falsely racialized by later readers.
Philosophy & Thinkers
His ideas were hijacked, twisted, and weaponized in ways he would have found appalling. Nietzsche attacked German nationalism, antisemitism, and herd mentality. Later nationalists quoted him as if he belonged to them.
Quick answer
Nietzsche was misunderstood because his sister controlled and distorted his archive, his aphoristic style made selective quotation easy, and his most provocative concepts were ripped away from their context. The people who claimed him often represented exactly the mass politics he despised.

The hook
His sister Elisabeth shaped his posthumous archive.
The hidden mechanism
Aphorisms made him unusually easy to quote badly.
The twist
Concepts like Ubermensch and will to power were stripped from context.
Common mistake
He was not a proto-fascist.
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