You could break gamers down into 2 catagories. Adults and children ( mentality-wise anyway

).
The adult mentality is already formed, and if formed right, doesn't have a racial hatred issue to deal with.
But the child mentality, and I know some pretty old children

, needs to be encouraged not to feel superior to other races and nationalities.
So you could say that this wouldn't be an issue if children were brought up with the proper guidance.
If I were to think of the top 10 things to do for children, in that list would be:
Teach them that ignorance is very unhealthy, and can even kill.