You cannot change abruptly systems / countries / cultures by flooding them massively with migrants from different cultures by the tens of millions

Tell us what has changed abruptly. Concrete examples.

And if things have changed so much, why do they seem stuck in the 1930s?

they're people who are fed up with what the politicians have done to their countries.

And that is why they vote for billionaires to get the right to punch poor and different people. And to shout "Sieg! Heil!" at meetings.

Oh, sorry, they shout "Sieg! Mund!". Totally different /s

half of that region didn't suddenly wake up "neo-nazis"

Funny how they still have the same chants and slogans.