"Half the muders of Norway" means about 15, at least from 2014 data. A lot of different things could lead to fifteen murders in a year, one person who doesn't like refugees could do it.
(Also, I didn't misspell. Please be careful when quoting.)
>> A lot of different things could lead to fifteen murders in a year, one person who doesn't like refugees could do it.
According to an imam from the Malmö suburbs, it is an internal problem to the suburbs. Do you have other references?
http://www.svt.se/nyheter/lokalt/skane/malmo-imamens-uppmani...
Per capita, there are 4-5 times as many people shot in the cities of Sweden as in Norway, Denmark and Finland. And mainly by criminals from those suburbs. So there are quite a lot of data.
Google this yourself, but I suspect you know all this already.