How to get URL link on X (Twitter) App
1. TAKE BREAKS:
Here you can find the full letter and all the signatories so far. 

https://twitter.com/haenel_kh/status/1351540378449686530Maybe some context is useful:
In the night of the November pogroms in 1938, their shop was attacked. The nephew of the owners - who is still alive - remembers his uncle trying to defend the shop after the windows had been broken. He was ten at the time.