Why do I never see blacks or mexicans at an NHL GAME?

because the majority of hockey players come from places cold enough to play hockey through childhood (Canada, Russia, Sweden, Finland, northern US). There simply aren't as many black or hispanic people in these parts. It's not a racist sport, it's just that most blacks and hispanics grow up in warmer climates (southern US, central America), and don't get to play every winter on ponds or at local rinks.