That is the topic of my latest Bloomberg column.  Rather than work through the argument, which requires you to read the whole column, I'll just reproduce the most trollish part:

When I am in a foreign city and in search of interesting food, I have a trick: In which neighborhood, I ask the locals, am I most likely to get murdered? In Stockholm, Rinkeby was the answer, even though many of the people I asked had never been.

So I went to Rinkeby, which is mostly non-White and most notably Somalian. There were Yemeni, Ethiopian, Persian and other restaurants. (I had a good chicken mandi at one called Maida.) I felt safe the entire time, and saw plenty of solo women, including some blonde Swedes, walking leisurely along the main street, as well as many women with head coverings. I saw a Western Union office and a driving school, signs that people have some funds to send away or invest in a car.

I hope to write a longer post on immigration for you all soon.