By the way, is Jordan Greenway really the very first black U.S. Olympic ice hockey player?
Gosh, I didn't know that this sport was that white...
was....well, still is, but there are more brothers playing in the NHL every year. There are perfectly good, non-racist reasons that black people haven't been represented much in ice hockey though. You have to be a top athlete to play in the NHL, if you're a top athlete and you're black, you ain't wasting your time learning hockey when you already know how to play other sports (just by living) that make way more money at the top level. It's the same for white kids to, in most places. If you're a top athlete white kid in Dallas, you probably are never going to see an ice rink, much less show how good you could be at ice hockey. But in Buffalo? St.Louis? Detroit? A white top athlete may find his way onto the ice in those cities, and increasingly, so are some black kids. This is a good thing for everybody.
This is also why Americans (men) suck at soccer. Our top athletes are not playing soccer, they are playing basketball and football, a few find their way into baseball and hockey. It's not the same in Germany, Brazil or Mexico.