The Sages (Rosh Hashanah 17a) have revealed a wonderful tool:
“A person who forgives others who distress him and does not do or say anything negative in retaliation, will have all his sins forgiven.”
By removing your anger over the behavior of others, anger will be removed from you.
~ R’ Eliyahu Dessler zt”l
Emuna Daily 
l do remember Mr. Friedenberg and it is an interesting and meaningful story . Thank you for sharing !!