Quote from the notice: " He said "What kind of cunt-rag is this?" . He threw the flag on the ground and said: "I will shit on it!" "
He was later drafted in the army and died 23.09.1941 during a bombing attack in Ukraine.
There is a thread with a little more historical information on the Germany subreddit in German.
It is currently unknown whether he actually shat on the flag.
That was my attempt at the german word "Votzenlappen". It's hard to convey its original beauty.
I love some German words