Have the Rangers won the Stanley Cup yet?
Also, I am also confused about the anthem thing. Why does the crowd spend the anthem trying to drown it out with cheers? Why aren't they singing, why aren't the players singing?
Because it's the Cup. Cheering during the anthem isn't common during the regular season, and singing isn't particularly loud/common either unless it's some super-patriotic time, like this:
Boston Bruins anthem after Marathon bombing 4-17-13 #BostonStrong
Looks like Chicago is minutes away from winning the Stanley Cup, and the Cup itself still hasn't arrived due to severe weather in the city.