I don't want to be overly annoying with it because it also doesn't matter all that much, but the Nazi Aryan stuff wasn't really a belief that Germanic or Nordic people were "the Aryans." They believed the Aryans were a real people who had existed, not mythological, and basically that modern people in Nordic and Germanic nations were sort of "fallen" descendants of those ancient people.

They had a sort of hierarchy that basically people of Nordic descent who had their idealized perfect Nordic features were placed at the top as "closest to Aryan ideal." This is important because obviously not every Swede is 7ft tall, green eyed, blond hair, muscle bound. They were creating this "perfect" phenotype which excluded even many within the groups that ostensibly met their other criteria. At least as far as their birth place and perceived genetics went (traced through their parents/grandparents).

That's the entire basis or "logic" insofar as there needed to be any logic beyond "We want to kill them and take their lands" for Nazism. The belief in a fallen great race of people. The belief that they were the descendants of this race. And the belief that through "cleansing" their gene pools they could resurrect that great race again one day. It's sort of an implied "admission" of like "we and our recent ancestors were too close to the inferior races (Jews, Slavs, Roma, etc.) and our punishment is our current situation (humiliation of losing WWI and the Versailles agreement). If we throw off these inferior, lesser peoples and seek to cleanse our bloodlines we can rise again into the mighty Aryans." Something like that.

I'm only pointing this out because there's a reason many "non-Aryan" Germans and others from around the region were fine with Nazism directly opposing their existence. Even Hitler very clearly failed to meet the expectations set. The whole thing was less about who they were (though obviously that mattered. Those deemed not Aryan enough or refusing to get on board the project were condemned) and more about who they were going to be (again.) (In their minds anyway.)

It's just worth noting because they care less about someone's exact physical characteristics (though again obviously... it matters a lot) and more about being on board with the whole "bringing back the Aryans" idea. If you were a communist and looked like Arnold Schwarzenegger or that giant dude who played The Mountain, that was great and all... but you were still an enemy and were going to be dealt with the way they dealt with any Eastern European Jewish or Slavic communists. You gotta look the part and you gotta play the part of you can gtfo (usually through death). That's why they can write off Greta. She may meet their physical requirements, but ideologically she's very clearly not aligned with them. It might make some Nazi shed an extra tear to execute someone who looks like her, but they'll gladly do it anyway in pursuit of their goals. Whether they truly believe the Aryan myth stuff or are more pragmatic ie "just in it for the killing and stealing" she stands in their way and has to go.

You see similar (the same really) logic applied to anti-Zionist Jews. They may be "Jewish" but if they oppose Zionism... doesn't matter. Hardline Zionists will announce that they aren't real Jews. If it comes down to it they'll happily kill anti-Zionist Jews as well. No one can stand in the way of the ethnostate project.

Again abolitionists were treated in a similar way. If you meaningfully side with the oppressed then you are socially stripped of your protections and sometimes this leads to further consequences. The in-group may be slower to act on dissenters from within, but in the end there is some line that they will punish people for crossing. "The 1000 Year Reich," "Israel," or "The United States" were/are all far more important projects than any dissident regardless of their physical characteristics.

First time I saw introspection from those lot…and of course they decide to just be violent misanthropes with a slight soft spot for white people solely because they are white a la Mahito.

I’ve always assumed that most modern overt white supremists all came to it by way of 4chan culture and were therefore misanthropes first who then took up racism as a consciously absurd and entertaining expression of their misanthropy.