Perhaps I'm looking a little too deep into the original post, but when somebody creates a thread like this it always comes off (to me) as a real tidy way of saying "I don't like immigrants".
Perhaps if you feel Calgary is a crime laden hellscape on account of the immigrants then you should try and live in a city like Regina that boasts the lowest % of immigrants in Canada.
With a stat like that i'm sure they have a very low crime rate.