It is not great on their part for sure. But, like I said, I would like to hear the entirety of the conversation from the person in question. Was it you? Were no other options given? Did he go up the management chain to discuss options? Was the bank aware of him living overseas beforehand and have options in place if there were issues? Like I said, details.
If this is a customer with $100k in an account, you have the option (read “threat”) of moving your money elsewhere. That and going (social) media on them. There are always options to get things done - and if not, fly there and move the money elsewhere (true enough right now with Covid that would be an issue).