How did the Nazis figure out whether a person or community is 'Aryan' or not?

They used their “spidey sense”.

Ultimately, what made a group of people “Aryan” or not came down to how much they wanted them to be “Aryan”.

Nazi racism was not actually scientific, it was just a load of bullshit with a thin patina of “science-y” garwharbl to justify what was basically a totally ideological belief.

How did AI have a role in John Lennon's vocal performance on last year's Beatles song Now and Then, produced by Paul McCartney?

Poles are “ugly, subhuman Slavs” but hey, Hermann, have you noticed how hot and blond those leggy Polish chicks look? They don’t fit our “subhuman” model at all! İn fact, they kind of look like our Aryan ideal personified!

It was all bullshit the Nazis made up as they went along. Trying to cast it in real scientific terms is a waste of time.

And then we get sexy time with them!

Isn't it ironic people always talk about how much women hate Donald Trump, when almost any of them would marry him if they could? What he said in the 2005 Billy Bush video, almost every woman would share the sentiment if it got them his lifestyle.

Ja, well, Helmut, it’s very simple. Those hot leggy blondes are actually not Slavs at all but are, in fact, Aryans who got Slavicised. We need to rescue them from the pit of subhumanism that surrounds them by immediately giving them Aryan status!

If the Nazis wanted someone to be “Aryan”, they made up some cock and Bull story to justify it. If they wanted the opposite, they could be equally inventive in assigning someone to “Untermensch” status.

And then we get sexy time with them?

What is price of the "liberal celebrities" e.g. Bill Maher, Seth Meyers, Jon Stewart, Trevor Noah, Jimmy Kimmel, Desi Lydic etc. to join the great MAGA movement like Stephen Colbert who wanted to European ambassadorship to turn back on "the Left"?