I know a guy that was DF and worked as a purchasing agent for a school board. He needed to buy 60 computers. He decided to send in a request for a bid to his uncle the elder who owned a computer shop.
All he got in return was an email saying he can’t talk to him.
So much for treating a person like a gentile or man of the nations. He couldn’t even be civil on a professional level.
FYI. The computer shop is now bankrupt and he works as a janitor.