Any data to back this up?
According to the figures here (
List of United States cities by crime rate - Wikipedia), the following US cities in the NHL have higher murder rates than NYC, San Jose, Los Angeles and Anaheim (place on list in brackets):
St. Louis (1), Detroit (3), Newark (9), Philadelphia (12), Chicago (14), Pittsburgh (15), Washington DC (19), Nashville (21), Columbus (22), Buffalo(27), Las Vegas (33), Dallas (35), Miami (39), Tampa (42), Minneapolis (43), Phoenix (44), Boston (52) and Denver (53).
Then comes Los Angeles (63), Seattle (77), New York (80), San Jose (85), Anaheim (87) and Raleigh (unlisted).
The NHL has 25 American teams. 18 of those teams are in cities with higher murder rates than Los Angeles, Anaheim, San Jose and New York. Raleigh is the only NHL metro area off the list (good job Raleigh!).
So actually it looks like the safest NHL areas (at least when it comes to murder, but it looks like this is a pretty good indicator of criminality in general) in the USA according to these numbers would be:
1. Raleigh
2. Anaheim
3. San Jose
4/5. New York (Rangers and Isles)
6. Seattle
7. Los Angeles
Not trying to be an ass here. It's just that your assertion didn't match with any numbers I've seen citing those locations as particularly crime-ridden, although I think a lot of people claim that they are.