It is possible that the teacher has a racist attitude and that the student responded accordingly and/or that the student is a pain in the neck who plays the race card. 
It's possible that cultural differences are part of the mix as well; they could have inadvertently been hitting each other's hot buttons for months. All I am saying is that without knowing the entire history here, it's possible that the teacher is not a racist. Making sweeping judgements based on an incomplete story never seems to be a good practice to me.
On edit - I'd like to reiterate that it's not clear that the teacher ordered the student to call him "Master", I interpret the account to be that the teacher was asking if the student was calling him "Master". For a student to imply that a teacher is a slave owner is at least as big an insult as a teacher insulting a student by demanding to be called "Master".
Edit history
Recommendations
0 members have recommended this reply (displayed in chronological order):
= new reply since forum marked as read