Minorities just got a late start in hockey. Remember the professional sports in general are not really that old. For the NHL, forty years ago there were only 6 teams, all of them in the Canada and the northern US.
Black (and to a lesser degree Asian) players are starting to make an impact. I think geography is the #1 factor. As the geographic makeup of the NHL gets more American and as the population of Canada gets more diverse, the NHL will have more players of different ethnicities.
Also, the ice is typically about 1 inch thick. Half inch ice, then white paint, quarter inch ice, then lines and ads, then another quarter inch on top.
Black (and to a lesser degree Asian) players are starting to make an impact. I think geography is the #1 factor. As the geographic makeup of the NHL gets more American and as the population of Canada gets more diverse, the NHL will have more players of different ethnicities.
Also, the ice is typically about 1 inch thick. Half inch ice, then white paint, quarter inch ice, then lines and ads, then another quarter inch on top.