He had justification to be annoyed until he started being abusive, there were far better ways to have dealt with the situation. Both parties were wrong but he stepped over the line and was abusive.
Did she have her phone on speaker too?
I was in a hospital waiting room for a consultant the other day, they had the radio on with relaxing music as it was a challenging treatment for most. This guy came in and started listening to YouTube or suchlike on full speaker mode on a high volume. He was asked by a nurse to use headphones or turn the speaker off. He turned it off. 5 minutes later he rang someone and again had it on speaker and continued a two way conversation at full volume. You couldn't hear yourself think, it was really frustrating. The guy next to him, who was waiting for his wife to finish her consultation, asked him to turn it off, and the guy just stared him down and continued.
5 minutes later the consultant came out and said she was running late and the gentleman who was due in after me had a translator who was pushed for time so would I mind if he went first, I said fine. It turned out it was the speaker guy so I assumed he had no idea what we had been saying to him but on his way out he rang for a taxi and his English was pretty good.
I get you may need a translator for medical stuff but I think his English was sufficient to understand the comments re his phone, he chose not to. Its just manners in my mind to respect the peace of others.
So back to the train incident, neither acquitted themselves well, but there is no reason to be rude/racist.