Earlier quoted context omitted.
The Nazis weren't evil, but they were wrong. The whole "Jewish conspiracy" thing was bullshit. As was many of their beliefs. You could have Nazi values, and still disagree with the Nazis on a completely factual basis.
Yes it was - but it didn't start with them. The Protocols of the Elders of Zion , which was published in 1903 in Russia, kicked off that particular idea - and the nazis just ran with what popular thought already held. Also, true - going back to my grandmother, she's a raving anti-Semite, but has a Jewish daughter in law - and (now deceased) husband. The cognitive dissonance required is incredible, but common. She'll…
For example, there are plenty of example you can point to of an American conspiracy to overthrow governments, but it is not not cognitive dissonance to believe that a particular American was not involved in it.
The only reason that this logic does not apply to Jews is that their is no central hierarchy to Judaism, however it is still possible to believe that there is a shadow organization that is running the world and happens to be Jewish.