I don't understand why that bothers you so much. Are you equally bothered when people identify as a 'coder' or 'entrepreneur' as is quite common in this forum?
Sure, these things exist at a different granularity, but that doesn't explain why one is ok and the other is evil.
I don't think it's a question of Good vs Evil, but rather what was happening at that specific point in time - the fact that Jewish Germans were very publicly discriminated against (to the point where Jewish University academics in Germany were forced to hand in their resignation and barred from ever being public servants almost overnight).
http://users.physics.harvard.edu/~wilson/HUMANRIGHTS/Einstei...
if that Nietzsche book actually focuses on what he was doing specifically for the Aryan cause/goals, then you probably should
But seriously, this whole identifying as "Jew" like it were a Dr. Pepper commercial is getting tiresome. When are we going to be happy just being "Human"? Of what I read, Old Dr. E would have liked that title better. And I am 100% certain while he supported the creation of the new Israel in the early days, we wouldn't have been at all happy about what has become of things now.