Ah, miscommunication. Lots of misunderstanding went on there and that made him lose a job. I think they should have hired someone to teach/explain the employees about deaf/blind culture and sign language when they have a deaf/blind employer.
My job agency hired an ASL instructor, we both explained about deaf culture to my co-workers. That really helped a lot. I was surprise that in the article, it didn't say anything about having someone teach about our 'ways' so that way they won't get confused nor wrong idea about us.