This has nothing to do with guilt from 80 years ago. What are you even on about?
This is being done because Scholz is a spineless wimp, trying to appease the far-right in an attempt to steal back votes from the AfD (which will not work and will only further alienate the SPDs voter base). It’s a political move and the people being deported are being used as pawns.
It seems like it’s still possible to disable Gatekeeper on macOS 15: https://discussions.apple.com/thread/255759797
I haven’t tried it though. It’s so rare that I want to run something unsigned, I prefer leaving it enabled and then allowing whatever it is I want to run.