@bastianallgeier This is a brilliant, brave piece of writing. Thank you for posting it.
I've also recently been thinking a lot about my German grandparents. Their story is very different from your grandpa's (they were Jewish refugees from the Nazis, and very lucky to escape in the 30s) but learning about their lives led me to the same conclusions as you, and, also like you, to an anti-fascism I feel in my bones.