Love it when Canadians ridicule this concern ...
Imagine if russians ruled world hockey and you (canadians) were concerned all referees were from Russia and got these answers.
Stating russian referees are the best, they are so professional etc etc.
Let me assure you, you would NOT be completely satisfied with those answers.
Your answers are in fact proof that bias exists ...
And not even referees are immune to bias.
Check this link:
Referees are biased in favor of home teams—FACT
http://review.chicagobooth.edu/magazine/spring-2014/home-field-advantage-the-facts-and-the-fiction
Imagine that a swede is tripped in the end of a final against Canada in a 50-50 situation when the score is 5-5.
The refs will live with this decision for the rest of their lifes in Canada.
I would definitely want a referee from another country than Canada, and in your heart you Canadians would not want a russian referee in a game against Russia.
Some of you seem to think that Canadians are the perfect specimen of the human race. Completely unbiased and perfect in every way.
I think it might be because you win most international hockey tournaments. (BTW The reason for that is that you have way more hockey players than all other countries, not because you are genetically superior)